right: 2004 (click thumbnails for larger images)
Carol Guardo served as the interim president of the College of St
Benedict during the 2003-2004 academic year
The main goal of her presidency was to guide CSB through a smooth transition during the presidential search process
Guardo had a long career in higher education and was a successful college administrator
and a general administrator at various public and private colleges
She has held administrative positions in secular universities with professional areas like business
Guardo was the first woman chosen to head a public college in Rhode Island when she became president of Rhode Island College in 1985
and how the teaching/learning process has changed
drove her commitment to scholarship and the liberal arts
Guardo has helped CSB/SJU on multiple occasions
She was a consultant for CSB and SJU in areas of strategic planning and governance from 1993-2003
Guardo participated in the 1995 presidential search which selected Mary Lyons; and she assisted in the establishment of the coordinated academic administration for CSB and SJU
Guardo led an extensive assessment of the effectiveness of CSB and SJU’s coordinated administrative structure
During Guardo’s brief tenure as interim president of CSB
she continued the momentum of academic growth from the previous presidencies
She continued the coordinate relationship with SJU with the support of then SJU president Br
She concentrated on the initiation of a three-year task force that examined gender development at CSB and SJU
the task force considered what a college for women means
the task force contemplated what a college for men means
the task force ruminated on the meaning of the coordinate relationship between CSB and SJU
Special thanks to Meghan Flannery ’15 for drafting this text
© 2025 College of Saint Benedict and Saint John’s University
writer and mother of the web’s most influential fashion blogger
spent the weekend in the Marca: Ca’ del Poggio was the starting point of her excursions among the vineyards
She was moved by the frescoes in the Pieve di San Pietro di Feletto
She photographed the Molinetto della Croda and toasted in the headquarters of the Confraternita del Prosecco
the web’s most influential fashion blogger
visiting the most iconic and fascinating places in the area
which from 2019 is part of the Unesco World Heritage
Born in Novara to a family of Sicilian origin
mother of three daughters (Valentina and Francesca
Marina Di Guardo has worked for a long time in the fashion world
and a few years ago discovered a vocation for writing
so much so that she has published six noir novels (the last in order of time
for Mondadori) that have met with great success
Marina Di Guardo was invited to the Marca by the Association for the Heritage of the Prosecco Hills of Conegliano and Valdobbiadene
Ca’ del Poggio Ristorante & Resort – where she enjoyed the refined seafood cuisine of chef Marco Stocco
combined with the splendid views offered by the venue in San Pietro di Feletto – was the starting point for her excursions among the vineyards
In the stories posted on her Instagram profile
emphasising the beauty and uniqueness of the places
Marina Di Guardo has for all intents and purposes joined the very long list of VIP admirers of the Prosecco hills
And who knows whether the idyll of a weekend might have given rise to a desire to settle here
The charm of the most beautiful hills in the world spares no one
The 28th edition of the Corsa Internazionale Oderzo
Marcadoc – The hills of Venice deals with tourist
cultural and food and wine information of the Marca Trevigiana and the Veneto
CLICK HERE for High School Football Scores
TX – A high-speed pursuit on US 87 reached speeds exceeding 100 mph before coming to a halt north of Carlsbad on Friday
According to the Tom Green County Sheriff’s Office
deputies were notified just before noon by the Sterling County Sheriff’s Office about the pursuit entering the county
deploying spike strips that deflated three tires on the suspect’s vehicle
The chase ended when the vehicle slowed and stopped in Carlsbad
Guardo was booked into the Tom Green County Detention Center on charges of Evading Arrest and Detention and Driving While Intoxicated
Authorities also discovered Guardo had misdemeanor warrants out of Dickson County
pending bond and resolution of his outstanding warrants
View Past Issues
indie web and mobile news platform with a local audience larger than all the San Angelo TV stations
Advertising here can transform your business
We understand that seeing some stories may be difficult for some readers
Our goal as a news organization is to report on matters of public interest with accuracy and fairness
While we recognize that certain stories can be sensitive or unsettling
we are committed to providing transparent and factual reporting to keep our community informed
If there are specific inaccuracies or additional context you believe would enhance the story, we encourage you to share those with us for consideration. We take our responsibility to the community seriously and strive to maintain a respectful dialogue with our audience. Contact us here
When the engineers at Touratech designed the new Guardo Adventure Glove
they took into account all of the conditions riders face during a motorcycle trip
everything was considered when Guardo was created
protective and comfortable glove that’s perfect for any ride
no matter what is encountered.Sharktec® Nanotechnology is widely used in tactical applications and was a clear choice for the palm and fingers of the Guardo Adventure Glove
and provides incredible grip even when wet or oily
but is one of the toughest glove materials on the planet
About TouratechAdventure riders exploring the most remote locations on Earth have relied on Touratech since 1990
What began as a 12-page catalog has transformed into a massive adventure lifestyle guidebook with photo essays
and the world's largest selection of accessories for adventure-touring motorcycles
camping gear and other adventure touring accessories
Click to enlarge image Touratech-Guardo-01.jpg
It's that time of a year again - holiday shopping for your favorite motorcyclist can be hectic
We've compiled a list of a few gift ideas..
I currently own a pair of KLIM Induction gloves that I’ve beat the hell out of, so I was excited to try the KLIM Badlands Aero Pro gloves. They’re...
Volume 8 - 2020 | https://doi.org/10.3389/feart.2020.589925
This article is part of the Research TopicSeismicity in Volcanic AreasView all 20 articles
High-resolution seismic imaging enables the reconstruction of ascending paths of magma and fluids
shallow molten accumulation and flank collapse areas
all crucial information for developing an efficient eruption forecasting strategy
the Marching Cubes algorithm (MC - generally applied to medical visualization and three-dimensional (3D) modeling) is applied to 16 years of earthquake location data at Mt
The algorithm defines three-dimensional seismic clusters that take into account seismic location uncertainties and are embedded in a novel volcano-oriented Geographyc Information Systems (VolGIS) offering an interpretational environment comprising tomographic images and alternative geophysical models
The results show that a volume of very-low-seismicity is embedded in a high-velocity body
and acts as a zone of transition between transient magmatic events (west) and eastern deep seismicity related to the sliding eastern flank
The eastern cluster represents the 3D seismic signature of a deep (2–8 km below sea level) instability
affecting the portion of the eastern flank nearest to the feeding systems
This instability is likely caused by a combination of gravitational spreading and magmatic intrusions
It is thus necessary: 1) to develop more quantitative methods to define seismic clustering at a volcano; 2) to apply these methods to seismic locations recorded across years or decades
most likely to represent stationary or recurrent processes at a volcano
The resulting isosurfaces will envelope volumes of seismic clustering and contour aseismic zones
whose discussion is always part of tomographic interpretations
The application of the MC algorithm to locations recorded across decades offers a unique method to define background (tectonic or gravitational) or repeated (likely magmatic) processes acting inside the volcano quantitatively
The integration of VolGIS and the MC algorithm is aimed at refining interpretations of volcano seismicity considering both imaged structures and dynamics modeled from geophysical signals
Once applied to seismic locations spanning years
it provides a tool to mitigate several limitations in our ability to interpret volcano dynamics
including: 1) the possibility of accounting for uncertainties in seismic locations when interpreting them with geophysical models; 2) a quantitative definition of “seismic clustering” and aseismicity in a geolocalized environment developed explicitly for the interpretation of seismic tomographic maps; 3) a seismic model of the volcano unrelated to specific volcanic unrest and representative of decadal-scale volcano dynamics
In the present application, the MC algorithm uses as data the earthquakes nucleated between the years 2000 and 2016 at Mt. Etna, in the framework of the VolGIS. The first ten years of data are described and analyzed by Alparone et al. (2015). We added six years of location data (from 2010 to 2016), which were provided by the Gruppo Analisi Dati Sismici (2017)
These earthquakes are located in an area that spans between 14.707 and 15.295°E and from 37.509 to 37.900°N
in a depth range from −3 to 10 km b.s.l
We selected the “Date,” “Latitude,” “Longitude,” “Depth,” “Magnitude,” “RMS,” “ERH” and “ERZ” from the event location file
indicate the horizontal and vertical uncertainties in localization (in kilometres)
After setting the data-frame coordinate system, both a DEM of Etna (Bisson et al., 2016) and all the seismic events were loaded to the GIS-Workspace. Without any selection dependent on location uncertainties, both the top view (at different scales, i.e., 1:75,000, 1:125,000) (Figures 1A,B) and W-E cross-section view (Figure 1C) of the earthquake spatial distribution highlight a volume of low-to-zero seismicity for the selected period
The methods proposed allow to assess if this anomaly is an effect of graphic visualization or a feature related to the volcano dynamics
VolGIS incorporates the Marching Cubes algorithm (MC) and analyses the earthquake distribution in order to create a quantitative 3D model of the high-seismicity volumes
Geo-localized tomographic maps and models of deformation are then included in the GIS for interpretation
Earthquakes distribution at 1:75,000 (A) and 1:125,000 (B)
(C) Earthquakes distribution from a W-E view
The red dashed rectangles outline the area of low-to-zero seismicity
The MC samples a point cloud set by taking eight vertices simultaneously from a provided spatial grid, marking a cube. For each cube, the algorithm computes 28 = 256 possible polygons configurations values that, due to symmetries, are reduced to 15 possible polygons configurations (Supplementary Figure 1A)
The MC then queries a list of pre-calculated geometries to pick the combination of polygons that best represents the isosurface passing through the cube
given a predefined grid spacing and density isovalue set by VolGIS
the software applies the algorithm and generates the isosurface according to the spherical spreading law:
For a given dataset, the isovalue establishes what percentage of earthquake locations near to each vertex is required for the vertex to be inside the surface. The i-th vertex is included if W(i) has a value less than or equal to the isovalue, otherwise it falls outside of the surface (Supplementary Figure 1C). Another way to achieve the same effect is to uniformly increase or decrease all the vertices values (Lopes and Brodlie, 2003)
The MC algorithm solves a forward problem. It is thus necessary to test different datasets in order to assess the robustness of the imaged structures. The MC was applied to three different datasets (Figure 2; Supplementary Figure 2, 3)
created according to three different horizontal and vertical uncertainties (ERH and ERZ)
These applications test the robustness of the reconstructed structures
providing a control on visualization based on modeled uncertainties
We also test the stability of structure locations and shapes applying a bootstrap test
Isosurfaces obtained in the second analysis
The clusters C1 to C6 are outlined in blue
The first dataset comprises 6,907 earthquakes with a root-mean-squared (RMS) average value of 0.135
We took into consideration that the average ERH and ERZ are equal to 548 and 712 m
By dividing the entire area (51,779,297 m for each side) by the ERZ (712 m)
we obtained the maximum amount of cells that can be included in the analysis (72.7)
The software rounded down (72) to respect the ERH-ERZ constrain
obtaining a value equal to 719,15 m per each cell-side
The MC algorithm produced three isosurfaces, or clusters, that envelope the high seismicity volumes and constrain a volume of low (almost absent) seismicity (Supplementary Figure 2A):
located beneath the summit craters (C1) and south to it (C2)
have a vertical extent of 2.79 km (from 0.24 km above sea level to 2.56 km below it) and 3.6 km (from 0.56 to 4.16 km b.s.l.)
• The third cluster (C3) is located under the eastern sector of the volcano. It has an approximated thickness of 5 km, dipping eastward from its shallow point at 1.4–7.39 km b.s.l. (Supplementary Figure 3B)
• The algorithm allows the imaging of a fourth cluster
its dimension is smaller than the earthquake vertical uncertainty
so it is not interpreted in this first analysis
Here, we set the grid spacing to 505.45 m, since the used events have both ERH and ERZ equal or less than 500 m. In this case the total earthquakes and the average RMS are equal to 2,824 and 0.149, respectively. The results show the same three clusters obtained using the first dataset, together with three smaller ones of measurable dimensions (Figure 2A)
The clusters obtained with this dataset have a smaller extension compared to those obtained using Dataset 1
but the variations are within the dataset uncertainty
Both shape and position of the clusters remain the same
This result is due to the lower uncertainties in source location
• The cluster C1 has a vertical extent of 3.28 km (from 550 m a.s.l
The second cluster (C2) extends for 3.05 km
spanning from 0.12 to 3.17 km b.s.l
• Cluster C3 keeps both the same dimensions and position of the previous analysis
with a focal point at about 1.19 km b.s.l
• Two additional clusters are located above (C5) and below (C6) the second one (C2). They have both an average vertical extent of about 1 km and they range from 1.89 to 0.71 km a.s.l. and from 3.52 to 4.52 km b.s.l., respectively (Figure 2B)
confirming that Dataset 2 provides a robust spatial distribution of isosurfaces with reductions up to 40%
The comparison between both the tomographic maps and geodetic models with the seismic clusters allows to define a preliminary seismic zonation map of the volcano without separating the seismicity in different time periods
It is hence possible to characterize the clusters as produced by either gravitational or magmatic processes
the most obvious explanation is that this represents the buried
cooled signature of older magmatic activities
the location of the MC clusters relative to the HVB reveals that:
• between 1 and 2 km b.s.l., C2 and C4 are included in the HVB (Alparone et al., 2012) (Vp > 6 km/s - from cyan to purple), while C3 only contours its eastern edge (Supplementary Figure 6A,B)
• cluster C1, located between 37.737° and 37.765° latitude North and from 14.995° to 15.015° longitude East, is also inside the HVB between 2 and 3 km b.s.l. (Supplementary Figure 6B,C)
• At 3 km b.s.l. the HVB comprises the VLS as well as all the clusters except for C3 (Supplementary Figure 6C)
The HVB thus consistently comprises all clusters and the VLS except for C3 (red contour)
The VLS is thus a smaller-scale feature inside the high-velocity pattern that separates the main western clusters C1 and C2 from C3
The obvious questions are if the clusters are caused by different dynamics (magmatic
tectonic and gravitational) and if the VLS is part of the feeding systems of the volcano
We also compare clusters C1 and C2 with the location of the dike and crack models obtained from geodetic and GPS analyses performed between 2000 and 2016 (Figure 3)
• The locations and main orientations of clusters C1 and C2 match the crack projection modeled by Bonaccorso et al. (2002) relative to the lateral eruption of July 2001 (Figure 3A)
The source of ground deformation modeled in this study lies 1.5 km SW and at the same depth of the VLS
• The model proposed by Bruno et al. (2017), relative to the May 2015-September 2016 period, is located in the first cluster, in a range that spans between 2 and 6 km b.s.l., about 2 km west of the VLS (Figure 3C)
• Clusters C1 and C2 are adjacent to the fracture-weakness-zone (FWZ) modeled by Carbone et al. (2014). This zone, located just 1.6 km SW from the VLS, is interpreted as a deeper pressure source filled with highly-pressurized gases (Figure 3E)
• The surface dike projection modeled by Pezzo et al. (2020) comprises most of C1, C2 and most of the VLS (Figure 3F)
• The spatial relation between these models and the clusters west of the VLS (C1 and C2) shows that the corresponding seismicity is produced by transient magmatic activity, marking the well known “South-rift” (Acocella and Neri, 2003; Pezzo et al., 2020). The weak zone modeled by Pezzo et al. (2020)
considered as the superficial evidence of a deeper dike intrusion
is the only deformation anomaly crossing the VLS consistently
W-E cross-section highlighting (in gray) the area with low-seismicity above and below the VLS (in dashed blue-red)
FIGURE 5. A W-E cross-section view of Cluster C3 (red outline). The previously modeled detachment planes are represented in yellow (Bonforte and Puglisi, 2006) and light blue (Puglisi et al., 2008)
A W-E conceptual model explaining seismicity and sliding of the eastern flank of Mt
The earthquakes nucleated between 2000 and 2016 at Mt
Etna have been used as data in the Marching Cube algorithm
The MC has been framed in an experimental GIS (VolGIS)
which allows the users to obtain a three-dimensional seismic image in a few seconds and with a high quality graphics output
The system offers unique support in the imaging of relatively small-sized volumes within tomographic and deformation models resolved over kilometres
The framework allows to establish benchmark seismic zonation-mapping at volcanoes including uncertainties from seismic locations
It is specifically designed for volcanoes that have been mapped with seismic tomography and where extensive seismic networks and high-rate seismicity are available
These are today standards at many volcanoes worldwide
La Réunion and those of the Canary Island
all characterized by high-rate seismicity and flank instability
The results at Etna constrain a volume of low (almost-absent) seismicity
persistent across a 16 years period
We interpret this volume as a portion of the feeding system of the volcano embedded in a high velocity body
the VLS represents the zone of transition between seismicity caused only by transient dike-related activity (west of the VLS) and seismicity caused by mixed magmatic and gravitational components
The model provides the first 3D seismic evidence of the different dynamics affecting the deeper and shallower portion of flank closest to the feeding systems
with important implications on the estimation of the volumes affected by sliding and the forces causing it
Only time-dependent analyses will provide exact spatial correlations of the VLS with source deformation models
insight into the temporal instability of the eastern flank and whether the VLS is a stationary feature or can be reconstructed only after a major eruption of the volcano
The used software (VolGIS) provides graphic outputs that coincide with those shown in the article and in the Supplementary Material. The earthquake location data can be requested to the INGV-Osservatorio Etneo (Gruppo Analisi Dati Sismici, 2017)
RG designed the software and directed its development
generated the maps and wrote the first draft text
LS guided the overarching research direction and advised on the geophysics and volcanology
CD coordinated the technical work on the software
All authors contributed to revising the text
RG acknowledges the financial support of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Argentina
CD acknowledges the financial support of the project “Pi UNRN 40B-634” entitled “Desarrollo
Integración e Implementación de Herramienta de Visualización y Análisis 3D y 4D (convocatoria trianual 2017).”
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest
This work was made possible by the outstanding efforts of the staff at the INGV-Osservatorio Etneo
who provided us the seismic dataset and helped us to correctly interpret the variations of Coulomb stress at Etna
We thank Jurgen Neuberg for suggesting the comparison with the Coulomb stress and Guido Ventura for the insightful discussions on the volcanological significance of our results
We also thank the computer scientists of the LVCC for the support in the software development and A
Colubri for suggesting the application of the Marching Cube algorithm
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/feart.2020.589925/full#supplementary-material
Link between major flank slip and 2002–2003 eruption at Mt
CrossRef Full Text | Google Scholar
Acocella, V., and Neri, M. (2003). What makes flank eruptions? The 2001 Etna eruption and its possible triggering mechanisms. Bull. Volcanol. 65, 517–529. doi:10.1007/s00445-003-0280-3. CrossRef Full Text
Google Scholar
Aloisi, M., Bonaccorso, A., Cannavò, F., Currenti, G., and Gambino, S. (2020). The 24 December 2018 eruptive intrusion at etna volcano as revealed by multidisciplinary continuous deformaion networks (CGPS, borehole strainmeters and tiltmeters). J. Geophys. Res. Solid Earth 125, e2019JB019117. doi:10.1029/2019jb019117. CrossRef Full Text
Google Scholar
Aloisi, M., Cocina, O., Neri, G., Orecchio, B., and Privitera, E. (2002). Seismic tomography of the crust underneath the etna volcano, Sicily. Phys. Earth Planet. Inter. 134, 139–155. doi:10.1016/s0031-9201(02)00153-x. CrossRef Full Text
Google Scholar
Aloisi, M., Mattia, M., Monaco, C., and Pulvirenti, F. (2011). Magma, faults, and gravitational loading at Mount Etna: the 2002–2003 eruptive period. J. Geophys. Res. Solid Earth 116, B05203. doi:10.1029/2010jb007909. CrossRef Full Text
Google Scholar
Alparone, S., Barberi, G., Bonforte, A., Maiolino, V., and Ursino, A. (2011). Evidence of multiple strain fields beneath the eastern flank of Mt. Etna volcano (Sicily, Italy) deduced from seismic and geodetic data during 2003-2004. Bull. Volcanol. 73, 869–885. doi:10.1007/s00445-011-0456-1. CrossRef Full Text
Google Scholar
Alparone, S., Barberi, G., Cocina, O., Giampiccolo, E., Musumeci, C., and Patanè, D. (2012). Intrusive mechanism of the 2008-2009 Mt. Etna eruption: constraints by tomographic images and stress tensor analysis. J. Volcanol. Geoth. Res. 229-230, 50–63. doi:10.1016/j.jvolgeores.2012.04.001. CrossRef Full Text
Google Scholar
Etna (Italy) flank eruption and implications for the flank dynamics of the volcano
CrossRef Full Text | Google Scholar
Alparone, S., Maiolino, V., Mostaccio, A., Scaltrito, A., Ursino, A., Barberi, G., et al. (2015). Instrumental seismic catalogue of Mt. Etna earthquakes (Sicily, Italy): ten years (2000-2010) of instrumental recordings. Ann. Geophys. 58, 0435. 10.4401/ag-6591
CrossRef Full Text | Google Scholar
Understanding Etna flank instability through numerical models
CrossRef Full Text | Google Scholar
Azzaro, R., Bonforte, A., Branca, S., and Guglielmino, F. (2013). Geometry and kinematics of the fault systems controlling the unstable flank of Etna volcano (Sicily). J. Volcanol. Geoth. Res. 251, 5–15. doi:10.1016/j.jvolgeores.2012.10.001. CrossRef Full Text
Google Scholar
Barberi, G., Cocina, O., Neri, G., Privitera, E., and Spampinato, S. (2000). Volcanological inferences from seismic-strain tensor computations at Mt. Etna Volcano, Sicily. Bull. Volcanol. 62, 318–330. doi:10.1007/s004450000101. CrossRef Full Text
Google Scholar
Bisson, M., Spinetti, C., Neri, M., and Bonforte, A. (2016). Mt. Etna volcano high-resolution topography: airborne LiDAR modelling validated by GPS data. Int. J. Digital Earth 9, 710–732. doi:10.1080/17538947.2015.1119208. CrossRef Full Text
Google Scholar
Bonaccorso, A., Aloisi, M., and Mattia, M. (2002). Dike emplacement forerunning the Etna July 2001 eruption modeled through continuous tilt and GPS data. Geophys. Res. Lett. 29, 1624. doi:10.1029/2001gl014397. CrossRef Full Text
Google Scholar
Bonforte, A., Bonaccorso, A., Guglielmino, F., Palano, M., and Puglisi, G. (2008). Feeding system and magma storage beneath Mt. Etna as revealed by recent inflation/deflation cycles. J. Geophys. Res. Solid Earth 113, B05406. doi:10.1029/2007jb005334. CrossRef Full Text
Google Scholar
Bonforte, A., Guglielmino, F., and Puglisi, G. (2013). Interaction between magma intrusion and flank dynamics at Mt. Etna in 2008, imaged by integrated dense GPS and DInSAR data. G-cubed 14, 2818–2835. doi:10.1002/ggge.20190. CrossRef Full Text
Google Scholar
Bonforte, A., Guglielmino, F., and Puglisi, G. (2019). Large dyke intrusion and small eruption: the December 24, 2018 Mt. Etna eruption imaged by Sentinel‐1 data. Terra Nova 31, 405–412doi: 10.1111/ter.12403. CrossRef Full Text
Google Scholar
Bonforte, A., and Puglisi, G. (2003). Magma uprising and flank dynamics on Mount Etna volcano, studied using GPS data (1994–1995). J. Geophys. Res. Solid Earth 108, 2153. doi:10.1029/2002jb001845. CrossRef Full Text
Google Scholar
Bonforte, A., and Puglisi, G. (2006). Dynamics of the eastern flank of Mt. Etna volcano (Italy) investigated by a dense GPS network. J. Volcanol. Geoth. Res. 153, 357–369. doi:10.1016/j.jvolgeores.2005.12.005. CrossRef Full Text
Google Scholar
Borgia, A., Delaney, P. T., and Denlinger, R. P. (2000). Spreading volcanoes. Annu. Rev. Earth Planet Sci. 28, 539–570. doi:10.1146/annurev.earth.28.1.539. CrossRef Full Text
Google Scholar
Borgia, A., Ferrari, L., and Pasquarè, G. (1992). Importance of gravitational spreading in the tectonic and volcanic evolution of Mount Etna. Nature 357, 231–235. doi:10.1038/357231a0. CrossRef Full Text
Google Scholar
Bruno, V., Mattia, M., Montgomery-Brown, E., Rossi, M., and Scandura, D. (2017). Inflation leading to a slow slip event and volcanic unrest at Mount Etna in 2016: insights from CGPS data. Geophys. Res. Lett. 44, 141–149. doi:10.1002/2017gl075744. CrossRef Full Text
Google Scholar
Cannata, A., Spedalieri, G., Behncke, B., Cannavó, F., Di Grazia, G., Gambino, S., et al. (2015). Pressurization and depressurization phases inside the plumbing system of Mount Etna volcano: evidence from a multiparametric approach. J. Geophys. Res. Solid Earth 120 (9), 5965–5982.CrossRef Full Text
Cannata, A., Di Grazia, G., Giuffrida, M., Gresta, S., Palano, M., Sciotto, M., et al. (2018). Space-time evolution of magma storage and transfer at Mt. Etna volcano (Italy): the 2015–2016 reawakening of Voragine crater. Geochem. Geophys. Geosyst. 19, 471–495. doi:10.1002/2017gc007296. CrossRef Full Text
Google Scholar
Carbone, D., Gibert, D., Marteau, J., Diament, M., Zuccarello, L., and Galichet, E. (2014). An experiment of muon radiography at Mt Etna (Italy). Geophys. J. Int. 196, 633–643. doi:10.1093/gji/ggt403. CrossRef Full Text
Google Scholar
Cardaci, C., Coviello, M., Lombardo, G., Patané, G., and Scarpa, R. (1993). Seismic tomography of Etna volcano. J. Volcanol. Geoth. Res. 56, 357–368. doi:10.1016/0377-0273(93)90002-9. CrossRef Full Text
Google Scholar
Chiarabba, C., Amato, A., Boschi, E., and Barberi, F. (2000). Recent seismicity and tomographic modeling of the Mount Etna plumbing system. J. Geophys. Res. 105, 10923–10938. doi:10.1029/1999jb900427. CrossRef Full Text
Google Scholar
Etna plumbing system: the contribution of seismic tomography
Google Scholar
Cline, H. E., Dumoulin, C. L., Hart, H. R., Lorensen, W. E., and Ludke, S. (1987). 3D reconstruction of the brain from magnetic resonance images using a connectivity algorithm. Magn. Reson. Imag. 5, 345–352. doi:10.1016/0730-725x(87)90124-x. CrossRef Full Text | Pubmed
Google Scholar
Cocco, M., and Rice, J. R. (2002). Pore pressure and poroelasticity effects in Coulomb stress analysis of earthquake interactions. J. Geophys. Res. Solid Earth 107, ESE–2. doi:10.1029/2000jb000138. CrossRef Full Text
Google Scholar
Currenti, G., Del Negro, C., Ganci, G., and Williams, C. A. (2008). Static stress changes induced by the magmatic intrusions during the 2002-2003 Etna eruption. J. Geophys. Res.: Solid Earth 113, B10206. doi:10.1029/2007jb005301. CrossRef Full Text
Google Scholar
Google Scholar
De Gori, P., Chiarabba, C., and Patanè, D. (2005). Qp structure of mount etna: constraints for the physics of the plumbing system. J. Geophys. Res. 110, B05303. doi:10.1029/2003JB002875. CrossRef Full Text
Google Scholar
De Luca, G., Filippi, L., Patanè, G., Scarpa, R., and Vinciguerra, S. (1997). Three-dimensional velocity structure and seismicity of Mt. Etna volcano, Italy. J. Volcanol. Geotherm. Res. 79, 123–138. doi:10.1016/s0377-0273(97)00026-7. CrossRef Full Text
Google Scholar
De Novellis, V., Atzori, S., De Luca, C., Manzo, M., Valerio, E., Bonano, M., et al. (2019). DInSAR analysis and analytical modeling of mount etna displacements: the december 2018 volcano‐tectonic crisis. Geophys. Res. Lett. 46, 5817–5827. doi:10.1029/2019gl082467. CrossRef Full Text
Google Scholar
De Siena, L., Chiodini, G., Vilardo, G., Del Pezzo, E., Castellano, M., Colombelli, S., et al. (2017). Source and dynamics of a volcanic caldera unrest: Campi Flegrei, 1983–84. Sci. Rep. 7, 8099. doi:10.1038/s41598-017-08192-7. CrossRef Full Text Pubmed
Google Scholar
Dynamics of Hawaiian volcanoes: an overview
Google Scholar
Giampiccolo, E., Cocina, O., De Gori, P., and Chiarabba, C. (2020). Dyke intrusion and stress-induced collapse of volcano flanks: the example of the 2018 event at mt. etna (sicily, Italy). Sci. Rep. 10, 6373. doi:10.1038/s41598-020-63371-3. CrossRef Full Text Pubmed
Google Scholar
González, P. J., and Palano, M. (2014). Mt. Etna 2001 eruption: new insights into the magmatic feeding system and the mechanical response of the western flank from a detailed geodetic dataset. J. Volcanol. Geotherm. Res. 274, 108–121. CrossRef Full Text Pubmed
Gruppo Analisi Dati Sismici, G. (2017). Catalogo dei terremoti della Sicilia Orientale-Calabria Meridionale (1999–2017). Catania, Italy: INGV. Available at: http://sismoweb.ct.ingv.it/maps/eq_maps/sicily/index.php (Accessed December 12
Google Scholar
Guardo, R., and De Siena, L. (2017). Integrating ambient noise with GIS for a new perspective on volcano imaging and monitoring: the case study of Mt. Etna. J. Volcanol. Geoth. Res. 347, 397–407. doi:10.1016/j.jvolgeores.2017.10.007. CrossRef Full Text
Google Scholar
Gudmundsson, A. (1983). Form and dimensions of dykes in eastern Iceland. Tectonophysics 95, 295–307. doi:10.1016/0040-1951(83)90074-4. CrossRef Full Text
Google Scholar
Hirn, A., Nercessian, A., Sapin, M., Ferrucci, F., and Wittlinger, G. (1991). Seismic heterogeneity of Mt Etna: structure and activity. Geophys. J. Int. 105, 139–153. doi:10.1111/j.1365-246x.1991.tb03450.x. CrossRef Full Text
Google Scholar
Huang, H.-H., Lin, F.-C., Schmandt, B., Farrell, J., Smith, R. B., and Tsai, V. C. (2015). The Yellowstone magmatic system from the mantle plume to the upper crust. Science 348, 773–776. doi:10.1126/science.aaa5648. CrossRef Full Text | Pubmed
Google Scholar
Jaxybulatov, K., Shapiro, N. M., Koulakov, I., Mordret, A., Landès, M., and Sens-Schönfelder, C. (2014). A large magmatic sill complex beneath the Toba caldera. Science 346, 617–619. doi:10.1126/science.1258582. CrossRef Full Text | Pubmed
Google Scholar
“Three dimensional images of geothermal systems: local earthquake P-wave velocity tomography at the Hengill and Krafla geothermal areas
California,” in Proceedings of the 1993 annual meeting on utilities and geothermal: an emerging partnership
Google Scholar
Studying deep sources of volcanism using multiscale seismic tomography
Google Scholar
Laigle, M., Hirn, A., Sapin, M., Lépine, J.-C., Diaz, J., Gallart, J., et al. (2000). Mount Etna dense array local earthquakePandStomography and implications for volcanic plumbing. J. Geophys. Res. 105, 21633–21646. doi:10.1029/2000jb900190. CrossRef Full Text
Google Scholar
Lopes, A., and Brodlie, K. (2003). Improving the robustness and accuracy of the marching cubes algorithm for isosurfacing. IEEE Trans. Visual. Comput. Graph. 9, 16–29. doi:10.1109/tvcg.2003.1175094. CrossRef Full Text
Google Scholar
Lorensen, W. E., and Cline, H. E. (1987). Marching cubes: a high resolution 3D surface construction algorithm. SIGGRAPH Comput. Graph. 21, 163–169. doi:10.1145/37402.37422. CrossRef Full Text
Google Scholar
Lundgren, P., Berardino, P., Coltelli, M., Fornaro, G., Lanari, R., Puglisi, G., et al. (2003). Coupled magma chamber inflation and sector collapse slip observed with synthetic aperture radar interferometry on Mt. Etna volcano. J. Geophys. Res.: Solid Earth 108, 2247. doi:10.1029/2001jb000657. CrossRef Full Text
Google Scholar
Lundgren, P., Casu, F., Manzo, M., Pepe, A., Berardino, P., Sansosti, E., et al. (2004). Gravity and magma induced spreading of Mount Etna volcano revealed by satellite radar interferometry. Geophys. Res. Lett. 31, L04602. doi:10.1029/2003gl018736. CrossRef Full Text
Google Scholar
“3D seismic volume visualization,” in Integrated image and graphics technologies
Google Scholar
Masala, G. L., Golosio, B., and Oliva, P. (2013). An improved marching cube algorithm for 3D data segmentation. Comput. Phys. Commun. 184, 777–782. doi:10.1016/j.cpc.2012.09.030. CrossRef Full Text
Google Scholar
Mattia, M., Bruno, V., Caltabiano, T., Cannata, A., Cannavò, F., D'Alessandro, W., et al. (2015). A comprehensive interpretative model of slow slip events on Mt. Etna’s eastern flank. Geochem. Geophys. Geosyst. 16, 635–658. doi:10.1002/2014gc005585. CrossRef Full Text
Google Scholar
Murray, J. B., de Vries, B. v. W., Pitty, A., Sargent, P., and Wooller, L. (2018). Gravitational sliding of the Mt. Etna massif along a sloping basement. Bull. Volcanol. 80, 40. doi:10.1007/s00445-018-1209-1. CrossRef Full Text Pubmed
Google Scholar
Murru, M., Montuori, C., Wyss, M., and Privitera, E. (1999). The locations of magma chambers at Mt. Etna, Italy, mapped by b-values. Geophys. Res. Lett. 26, 2553–2556. doi:10.1029/1999gl900568. CrossRef Full Text
Google Scholar
Neri, M., Acocella, V., and Behncke, B. (2004). The role of the Pernicana fault system in the spreading of Mt. Etna (Italy) during the 2002–2003 eruption. Bull. Volcanol. 66, 417–430. doi:10.1007/s00445-003-0322-x. CrossRef Full Text
Google Scholar
Neri, M., Rivalta, E., Maccaferri, F., Acocella, V., and Cirrincione, R. (2018). Etnean and Hyblean volcanism shifted away from the Malta Escarpment by crustal stresses. Earth Planet Sci. Lett. 486, 15–22. doi:10.1016/j.epsl.2018.01.006. CrossRef Full Text
Google Scholar
Newman, T. S., and Yi, H. (2006). A survey of the marching cubes algorithm. Comput. Graph. 30, 854–879. doi:10.1016/j.cag.2006.07.021. CrossRef Full Text
Google Scholar
Palano, M. (2016). Episodic slow slip events and seaward flank motion at Mt. Etna volcano (Italy). J. Volcanol. Geotherm. Res. 324, 8–14. doi:10.1016/j.jvolgeores.2016.05.010. CrossRef Full Text
Google Scholar
Palano, M., Viccaro, M., Zuccarello, F., and Gresta, S. (2017). Magma transport and storage at Mt. Etna (Italy): a review of geodetic and petrological data for the 2002–03, 2004 and 2006 eruptions. J. Volcanol. Geotherm. Res. 347, 149–164. doi:10.1016/j.jvolgeores.2017.09.009. CrossRef Full Text
Google Scholar
Google Scholar
Parisio, F., Vinciguerra, S., Kolditz, O., and Nagel, T. (2019). The brittle-ductile transition in active volcanoes. Sci. Rep. 9, 143. doi:10.1038/s41598-018-36505-x. CrossRef Full Text Pubmed
Google Scholar
Patanè, D., Barberi, G., Cocina, O., De Gori, P., and Chiarabba, C. (2006). Time-resolved seismic tomography detects magma intrusions at Mount Etna. Science 313, 821–823. doi:10.1126/science.1127724. CrossRef Full Text Pubmed
Google Scholar
Patanè, D., Chiarabba, C., Cocina, O., Gori, P. D., Moretti, M., and Boschi, E. (2002). Solid Earth-135. Tomographic images and 3D earthquake locations of the seismic swarm preceding the 2001 Mt. Etna eruption: evidence for a dyke intrusion. Geophys. Res. Lett. 29. doi:10.1029/2001gl014391. CrossRef Full Text
Google Scholar
Patanè, D., De Gori, P., Chiarabba, C., and Bonaccorso, A. (2003). Magma ascent and the pressurization of Mount Etna’s volcanic system. Science 299, 2061–2063. doi:10.1126/science.1080653. CrossRef Full Text Pubmed
Google Scholar
Pezzo, G., Palano, M., Tolomei, C., De Gori, P., Calcaterra, S., Gambino, P., et al. (2020). Flank sliding: a valve and a sentinel for paroxysmal eruptions and magma ascent at Mount Etna, Italy. Geology 48. doi:10.1130/g47656.1. CrossRef Full Text
Google Scholar
Puglisi, G., Bonforte, A., Ferretti, A., Guglielmino, F., Palano, M., and Prati, C. (2008). Dynamics of Mount Etna before, during, and after the July–August 2001 eruption inferred from GPS and differential synthetic aperture radar interferometry data. J. Geophys. Res. Solid Earth 113, B06405. doi:10.1029/2006jb004811. CrossRef Full Text
Google Scholar
Puglisi, G., Bonforte, A., and Maugeri, S. R. (2001). Ground deformation patterns on Mount Etna, 1992 to 1994, inferred from GPS data. Bull. Volcanol. 62, 371–384. doi:10.1007/s004450000112. CrossRef Full Text
Google Scholar
Rasà, R., Azzaro, R., and Leonardi, O. (1996). Aseismic creep on faults and flank instability at Mount Etna volcano, Sicily. Geol. Soc. London Special Public. 110, 179–192. doi:10.1144/gsl.sp.1996.110.01.14. CrossRef Full Text
Google Scholar
Rawlinson, N., and Spakman, W. (2016). On the use of sensitivity tests in seismic tomography. Geophys. J. Int. 205, 1221–1243. doi:10.1093/gji/ggw084. CrossRef Full Text
Google Scholar
Scandone, R., and Malone, S. D. (1985). Magma supply, magma discharge and readjustment of the feeding system of Mount St. Helens during 1980. J. Volcanol. Geoth. Res. 23, 239–262. doi:10.1016/0377-0273(85)90036-8. CrossRef Full Text
Google Scholar
Schuler, J., Greenfield, T., White, R. S., Roecker, S. W., Brandsdóttir, B., Stock, J. M., et al. (2015). Seismic imaging of the shallow crust beneath the Krafla central volcano, NE Iceland. J. Geophys. Res. Solid Earth 120, 7156–7173. doi:10.1002/2015jb012350. CrossRef Full Text
Google Scholar
Sharp, A. D. L., Davis, P. M., and Gray, F. (1980). A low velocity zone beneath Mount Etna and magma storage. Nature 287, 587–591. doi:10.1038/287587a0. CrossRef Full Text
Google Scholar
Multiparametric study of the February–April 2013 paroxysmal phase of Mt
Google Scholar
“Applying space subdivision techniques to volume rendering,” in Proceedings of the 1st conference on Visualization’90
Tibaldi, A. (2015). Structure of volcano plumbing systems: a review of multi-parametric effects. J. Volcanol. Geoth. Res. 298, 85–135. doi:10.1016/j.jvolgeores.2015.03.023. CrossRef Full Text
Google Scholar
Tibaldi, A., and Groppelli, G. (2002). Volcano-tectonic activity along structures of the unstable NE flank of Mt. Etna (Italy) and their possible origin. J. Volcanol. Geoth. Res. 115, 277–302. doi:10.1016/s0377-0273(01)00305-5. CrossRef Full Text
Google Scholar
Urlaub, M., Petersen, F., Gross, F., Bonforte, A., Puglisi, G., Guglielmino, F., et al. (2018). Gravitational collapse of Mount Etna’s southeastern flank. Sci. Adv. 4, eaat9700. doi:10.1126/sciadv.aat9700. CrossRef Full Text Pubmed
Google Scholar
How a complex basaltic volcanic system works: constraints from integrating seismic
and petrological data at Mount Etna volcano during the July–August 2014 eruption
Villaseñor, A., Benz, H. M., Filippi, L., De Luca, G., Scarpa, R., Patanè, G., et al. (1998). Three-dimensional P-wave velocity structure of Mt. Etna, Italy. Geophys. Res. Lett. 25, 1975–1978. doi:10.1029/98gl01240. CrossRef Full Text
Google Scholar
Walter, T. R., Acocella, V., Neri, M., and Amelung, F. (2005). Feedback processes between magmatic events and flank movement at Mount Etna (Italy) during the 2002–2003 eruption. J. Geophys. Res. Solid Earth 110, B10205. doi:10.1029/2005jb003688. CrossRef Full Text
Google Scholar
Etna Feeding System and Sliding Flank: A New 3D Image From Earthquakes Distribution in a Customisable GIS
Received: 31 July 2020; Accepted: 24 September 2020;Published: 28 October 2020
Copyright © 2020 Guardo, De Siena and Dreidemie. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use
distribution or reproduction in other forums is permitted
provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited
in accordance with accepted academic practice
distribution or reproduction is permitted which does not comply with these terms
*Correspondence: L. De Siena, bGRlc2llbmFAdW5pLW1haW56LmRl
a section of the journal Frontiers in Earth Science
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher
94% of researchers rate our articles as excellent or goodLearn more about the work of our research integrity team to safeguard the quality of each article we publish
As the group practice manager at Fairchild’s medical clinic
Guardo handles the business side of health care
who holds degrees in economics and business administration from East Carolina University
“My job is to match the patient with what they’re trying to buy.”
grew up in a military family in Fort Bragg
and she did too before joining the Air Force in 2015
“We just have a love for troops,” she said
“It doesn’t matter what their uniforms look like.”
Give directly to The Spokesman-Review's Northwest Passages community forums series -- which helps to offset the costs of several reporter and editor positions at the newspaper -- by using the easy options below
Gifts processed in this system are tax deductible
Get breaking news delivered to your inbox as it happens
© Copyright 2025, The Spokesman-Review | Community Guidelines | Terms of Service | Privacy Policy | Copyright Policy
Montclair resident Javier Guardo recently posed the question: What do residents usually do when they have concerns or ideas about how to improve their community
We bitch and we moan – pardon my French – to vent."
Guardo came up with a tool to get the attention of local residents and elected leaders
"PLANETCIVIC," in hopes that people will become more engaged in their community and inspire change
"PLANETCIVIC serves as a virtual town hall
where issues are ranked by popularity and people can come to get informed
and engage with elected officials and other community leaders who can move the needle," according to its mission statement
allows fellow Montclair residents to create an account and vote for initiatives they want to see move forward in Montclair
Top ones included "Improve lighting and visibility in Montclair" and "Town administration: Declare Montclair a sanctuary." Each person who signs up gets a limited number of votes to use
That way "they will need to think a little harder what’s really important to them," Guardo said
Residents can create their own initiatives within a matter of minutes
There is also a section where residents can start profiles on civic leaders and volunteers in town
and other users can "thank" those volunteers for their work in the community
to ensure that only Montclair residents are weighing in on Montclair topics
"We are creating a sense of community and as a result
it’s important that real people with real names
can be participants of the platform," Guardo said
"There's an agency and accountability to this organization that we hope creates a pure discourse where people aren't just shooting off their mouths
a communications consultant for Guardo and PLANETCIVIC
Guardo noticed Spain's economic crisis and high unemployment prompted millions of citizens to camp out in a square for 27 days in protest
"The system wasn’t built for anything to change."
Guardo became "more and more passionate" about his idea of creating something where people could become more involved and have a positive impact
he left his job in finance to focus solely on developing this concept
"My wife was not very excited about me leaving my job
so it took a lot of time to convince her this is what I really want to do," he said
He noted that PLANETCIVIC doesn't take a position on the initiatives and doesn't influence them
Guardo said feedback has been "incredible" so far
He intends to spread the word through social and local media
The website has already caught the attention of elected leaders in town
Second Ward Township Councilperson Robin Schlager said Guardo showed her how the site works and she feels it's a "great tool."
"Javier’s new website would make it easier for residents to take a poll or take the temperature of what their neighbors are thinking," Schlager said
I would like to know how folks are feeling
So maybe I could see myself using it in the future for various issues
I thought it was a really positive thing," she added
Mayor Robert Jackson agreed that it can be useful for residents and elected officials
This content references scientific studies and academic research
Our team of licensed nutritionists and dietitians strives to be objective
We are committed to bringing you researched
expert-driven content to help you make more informed decisions around food
We know how important making choices about your overall health is
and we strive to provide you with the best information possible
A post shared by marinadiguardo (@marinadiguardo)
Marina appeared recently at The Power of Confidence conference at the Palazzo Parigi
she said there: "Our self-esteem is built from childhood
our mother lay the foundations for our personal fulfillment
when an effective parental contribution is lacking
it becomes important to grant ourselves the attention
the trust that has not been reserved for us and to become our own parents."
"My first time in Dubai🥰," she captioned one photo her drinking from a coconut. "Coconut water is popular for rehydration after exercise or during mild illness. It's true that coconut water has electrolytes, such as potassium, sodium and manganese. The amounts vary by brand," says the Mayo Clinic
"Some evidence suggests that coconut water is comparable to sports drinks
But it's no more hydrating than plain water
Coconut water does have calories — 45 to 60 calories in an 8-ounce serving
A post shared by marinadiguardo (@marinadiguardo)
Copyright 2025 Galvanized Media. All Rights Reserved. Celebwell is part of the Dotdash Meredith Publishing Family.
Volume 10 - 2022 | https://doi.org/10.3389/feart.2022.849152
Active seismic experiments allow reconstructing the subsurface structure of volcanoes with unprecedented resolution and are vital to improve the interpretation of volcanic processes
They require a quality assessment for thousands of seismic waveforms recorded at hundreds of stations in the shortest amount of time
the processing necessary to obtain reliable images from such massive datasets demands signal processing and selection strategies specific to the inversions attempted
we present a semi-automated workflow for data selection and inversion of amplitude-dependent information using the original TOMODEC2005 dataset
The workflow is built to tomographic techniques using amplitude information
and can be generalised to passive seismic imaging
It first selects data depending on standard attributes
like the presence of zeroes across all seismic waveforms
waveform selections depend on inversion-specific attributes
like the delay of the maximum amplitude of the waveform or the quality of coda-wave decays
The automatic workflow and final visual selections produce a dataset reconstructing anomalies at a node spacing of 2 km
imaging a high-attenuation anomaly in the centre of the Deception Island bay
Attenuation models are then obtained at a node spacing of 1 km
highlighting bodies of highest attenuation scattered across the island and a NW-SE trend in the high-attenuation anomaly in the central bay
These results show the effect of the local extension regime on volcanic structures
providing details on the eruptive history and evolution of the shallow magmatic and hydrothermal systems
The selection workflow can be easily generalised to other amplitude-dependent tomographic techniques when applied to active seismic surveys
Image improvements from the original dataset are minor when selecting data using standard attributes
Tomographic maps become drastically more stable and consistent between different frequencies and resolutions when data selection targets attributes specific to the inversion
Simplified regional tectonic map and location of the South Shetland Islands (A) and map of Deception Island with toponymics (B)
Given the quantity of seismic traces produced by these experiments
an automatic or quasi-automatic system preliminary to inversion is necessary
the obtained dataset must be applied to the corresponding imaging code to compare the results quantitatively with the same standard
is used to perform data processing and inversion
The majority of the analysis focuses on reducing errors during the processing phases
increasing consistency between different node spacing and frequencies
We show that we reduce residuals by targeting the inversion results while increasing resolution on structures without any additional computational cost
these criteria do not target the ability of the dataset to perform a specific task
as imaging coda attenuation: such criteria could remove waveforms from datasets unnecessarily
(A): Trace with spurious signal; (B): Trace with null values; (C): Traces identified visually as being usable
The user choice for the first four iterations is to exclude those waveforms:
with a coda-window smaller than 4 seconds;
whose logarithmic coda decay had a small correlation coefficient relative to a line;
showing recurrent glitches at specific stations
Comparison between selection parameters at each selection iteration and relative to the signal-to-noise ratio
Summary table of the additional parameters considered
The anti-aliasing filter attenuates higher spectral bands hindering the tomographic analysis
For each dataset, we obtain four Qc−1 maps depending on frequencies at constant node spacing of 2 km (Figure 4) and 1 km (Figure 5). The input and output of the chequerboard test for each spatial resolution are shown in Figure 6
Maps of coda attenuation (Qc−1) obtained with a node spacing of 2 km
Each panel corresponds to the results obtained with the original dataset (A)
20283 traces) or after removing traces: (B) with an average percentage of zeros greater then 40% (14972 traces); (C) whose main peak amplitude was later than 6 s (13105 traces); (D) having a coda decay correlation coefficient lower than 0.6 (7895 traces); (E) at stations with instruments producing spikes (7197 traces)
TB: Telephone Bay; PC: Pendulum Cove; MP: Mount Pond; EP: Entrance Point; MK: Mount Kirkwood; FB: Fumarole Bay
FIGURE 5. As for Figure 4 for a node spacing of 1 km
Each panel corresponds to a different iteration
Chequerboard test input and output maps related to the datasets obtained after each iteration
The colorbar shows the variations of (Qc−1)
The original dataset comprises 20283 traces with a duration of 10 s each. We obtain eight attenuation maps - one for each frequency at 2 km (Figure 4A) and 1 km (Figure 5A) node spacing together with the associated chequerboard test (Figure 6A
The Qc−1 anomalies obtained at 1 km node spacing (Figure 5B) are similar to those obtained in the previous step at 6 Hz; however, at the other frequencies, the maps seem to resolve the central part of the island. The primary anomalies are located in the inner bay, mainly north, northeast and west, in the areas of Telephone Bay, Pendulum Cove and Fumarole Bay, respectively (Figure 1A)
The most likely explanation is an inappropriate definition of the damping parameter for this iteration; however
the workflow still stores the results due to the success of the 1-km resolution results
The results are shown in Figures 4C, 5C). For the first time, the Qc−1 anomalies at 1 km resolution appear consistent at different frequencies. They are primarily located in four areas: Telephone Bay in the north; Pendulum Cove in the northeast; Fumarole Bay in the west; and Entrance Point in the south (Figure 1)
only the anomalies at 6 and 21 Hz are consistent with each other and with those at 1 km
the primary variations appear in an area not resolved by the chequerboard test
The resolution tests give scientifically-meaningful results 6c
The most significant change from previous patterns is the general attenuation increase and smoother high-attenuation anomalies in the inner bay
the Qc−1 maps still lack coherency between different frequencies and node spacing
suggesting that some undesired traces are still in the dataset
The results (Figures 4D, 5D) show for the first time homogeneous patterns between the maps at all frequencies and resolutions
the areas of highest Qc−1 are 3: in the northeast (Pendulum Cove)
west-southwest (in between Fumarole Bay) and in the south (Entrance Point)
This is the first iteration where a low Qc−1 anomaly appears in the Mount Kirkwood area
In addition to all these punctual anomalies
a wide NNW-SSE orientated high Qc−1 anomaly covers the inner bay
The primary difference between 1 and 2 km node spacing is in the extent of the anomalies
the high Qc−1 anomaly covers from Pendulum Cove to Telephone Bay in the northern area
it covers the Neptune Bellows area completely
a high Qc−1 anomaly is located in the west
At 2 km resolution, a low Qc−1 anomaly appears at the south end of Mount Pond, while, between 21 and 9 Hz, another low Qc−1 anomaly is located east of Mount Kirkwood. Also, for the first time, all these anomalies fall in the resolved area (Figure 6D): this aspect
together with the similarities between maps at all frequencies and node spacing
suggests we could stop the selection process
there are several differences between the last results and those obtained in the previous iterations
The most evident differences at 1 km are:
• the high Qc−1 anomaly in the Fumarole Bay area is shifted toward Mount Kirkwood;
• the low Qc−1 anomaly in the northern area is more defined and localised;
• a new low Qc−1 anomaly appears at the south end of Mount Pond
These values are very similar to those obtained in the previous iteration
This procedure estimates uncertainty more accurately
providing an additional tool to interpret the results
Higher damping (21.6) outputs an unsolved chequerboard pattern
At 15 Hz and 1 km node spacing, lower damping (0.11) produces results where two positive anomalies located south of Fumarole Bay and Pendulum Cove dominate the map. However, these areas are unsolved in the chequerboard test, while for a higher order of magnitude (11.8), the chequerboard test is completely unresolved (Supplementary Figure S4). In the last case (15 Hz, 2 km, Supplementary Figure S5)
the chequerboard test looks completely solved for low damping
while at a higher order of magnitude (15.5)
All the maps obtained using different damping values show lower consistency and resolution than the original damping: we conclude that the selected damping is the best compromise to interpret the maps
Through our selections, we evaluate the average value of (Table 2):
• the mean amplitude of the noise windows (AmpNoise);
• the mean amplitude of the signal;
• the signal-to-noise-ratio value;
• the mean amplitude in the coda windows;
• the maximum power spectrum mean amplitude (MaxPowAmp);
• the frequency of the maximum power spectrum (MaxPowF);
• the mean auto-correlation value (AutoCorr);
the summation of all the value ≥500;
the average difference between a spike and the next value;
• the standard deviation of the Short Term Average vs
The chosen iteration order minimises the iteration number and avoids the excessive removal of waveforms. To verify the quality of the sequence, we used the signal-to-noise ratio (SNR), the first discrimination parameter used to select seismic waveforms in standard seismic applications (Valentine and Woodhouse, 2010)
Noise is measured on a window of 1 s before the arrival of the P-wave
The SNR is normalized for the window used to compute the signal and noise amplitudes
very high SNR values represent signals with spikes
This value decreases from 658.84 in the original dataset to 35.73 in the final one
Table 1 shows that selecting data depending on the SNR worsens the fit and removes around 1000 additional waveforms without changing dramatically the correlation coefficient, the main marker of the quality of the data used to perform the tomography. These could still be waveforms suitable for a reliable tomographic image. We remove one-third of the dataset using only the SNR ratio (Table 1) (30.94%)
causing: 1) a higher percentage of zeroes and a worse average correlation coefficient than in any iteration; 2) an average peak delay higher than any selected dataset except Dataset 2
we cannot ensure that a fully automatic selection would be as successful with another dataset
The sequence chosen to apply selection parameters is irrelevant if the last automatic selection is performed using the attribute that defines the data quality in the tomographic procedure
this parameter is the correlation coefficient of the coda decay
It is the quality of a P- or S-wave picks in travel-time tomography
A successful selection will substantially reduce the dataset without deteriorating the resolution in the area of interest
allowing to reconstruct smaller-scale details without redundancy in the data
we used the similarity between maps obtained at different frequencies as an additional marker of solution stability
This qualitative approach can be likely improved using a 2D correlation analysis
They can thus provide an essential link between what we know from field and modelling studies and what we can image of the volcano interior
This work is a stepping stone to produce more refined
Active seismic experiments are rapidly becoming the standard in volcano tomography
we demonstrate that efficient data selection strategies can retrieve stable and resolved anomalies that remain blurred without them
Once applied to other available active datasets
the workflow could reveal fine details of the volcanic structures that have remained invisible but could be essential to understand the volcano dynamics
Its application to passive seismicity is certainly more challenging
given the uncertainties associated with volcano seismicity detection and characterisation
selection strategies targeting specific tomographic techniques could drastically improve detection of structures at hazardous volcanoes with decades of seismic records
An inversion-specific semi-automated selection strategy applied to an active seismic dataset recorded at Deception volcano improves stability and robustness of tomographic maps exploiting amplitude information
The combination of standard and inversion-specific selection attributes improves images obtained with different node spacing and at multiple frequencies
showing a consistent picture of the volcano interior
These maps are compatible with existing attenuation maps
The inversion for coda attenuation using the final dataset shows higher resolution on the centre of the caldera at the expense of lateral illumination
The images highlight sites of eruptions and extensional trends
if confirmed by comparison with the extensive geological and geochemical records
could better link the present state of the caldera with its geological past
Volcano tomography using active datasets is now well past its infancy
Our results demonstrate that it cannot simply rely on data-selection strategies taken from global tomography or seismic exploration in oil and gas
Attributes like coda attenuation are not part of standard processing procedures for seismic imaging
Our method focuses on object-oriented data quality
first evidencing the most prominent standard attributed biasing results (the percentage of zeroes across the dataset) and then selecting datasets to optimise the attributes used for the inversion
The results prove that using only standard quality assessments
leads to trade-offs and unnecessary loss of information
The same procedure can be defined for any attribute used to do imaging
and the method is easily extendable to passive datasets that are more relevant for volcano-monitoring institutions
the adaptation of these workflows to the detection of seismic signals produced by the volcano could help the long-standing effort of the community to recognise pre-eruptive signals
Once combined with the increasing interdisciplinary knowledge available at Deception Island and other volcanoes
their implementation in passive tomography can help better constrain the interpretation of pre-existing structures
current processes and future eruptions by avoiding trade-offs from redundant data
Publicly available datasets were analyzed in this study. This data can be found here: https://github.com/RobertoGuardo/QcDataCleaning
RG designed the data cleaning code and its development
LD guided the overarching research direction and contributed to data interpretation and manuscript writing
RG acknowledges the financial support of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Argentina
TeMaS–Terrestrial Magmatic Systems Research Area of the Johannes Gutenberg University (Landesinitiative des Landes Rheinland-Pfalz) privided additional funding for the research
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
Any product that may be evaluated in this article
or claim that may be made by its manufacturer
is not guaranteed or endorsed by the publisher
Janire Prudencio for providing us with the original TOMODEC2005 dataset before its publication and helping us assess the starting dataset
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/feart.2022.849152/full#supplementary-material
1MuRAT2D and MuRAT3D are open access Matlab codes available on GitHub, at https://lucadesiena.github.io/MuRAT/
High-resolution Seismic Tomography of Compressional Wave Velocity Structure at Newberry Volcano
CrossRef Full Text | Google Scholar
Google Scholar
Merging Active and Passive Data Sets in Traveltime Tomography: the Case Study of Campi Flegrei Caldera (Southern Italy)
CrossRef Full Text | Google Scholar
Crustal Inheritance and a Top-Down Control on Arc Magmatism at Mount st helens
CrossRef Full Text | Google Scholar
The P-Wave Velocity Structure of Deception Island
CrossRef Full Text | Google Scholar
A Reappraisal of Shear Wave Splitting Parameters from Italian Active Volcanic Areas through a Semiautomatic Algorithm
CrossRef Full Text | Google Scholar
Seismic Scattering and Absorption Mapping from Intermediate-Depth Earthquakes Reveals Complex Tectonic Interactions Acting in the Vrancea Region and Surroundings (Romania)
CrossRef Full Text | Google Scholar
Lapse-time Dependence of Coda Q: Anisotropic Multiple-Scattering Models and Application to the Pyrenees
CrossRef Full Text | Google Scholar
A Comparative Study of Dimensionality Reduction Algorithms Applied to Volcano-Seismic Signals
Google Scholar
Practical Volcano-independent Recognition of Seismic Events: Vulcan
Google Scholar
3d Ultra-high Resolution Seismic Imaging of Shallow Solfatara Crater in Campi Flegrei (italy): New Insights on Deep Hydrothermal Fluid Circulation Processes
PubMed Abstract | CrossRef Full Text | Google Scholar
Source and Dynamics of a Volcanic Caldera Unrest: Campi Flegrei
PubMed Abstract | CrossRef Full Text | Google Scholar
Space-weighted Seismic Attenuation Mapping of the Aseismic Source of Campi Flegrei 1983?1984 Unrest
CrossRef Full Text | Google Scholar
Seismic Scattering and Absorption Mapping of Debris Flows
CrossRef Full Text | Google Scholar
Multi-scale Reasonable Attenuation Tomography Analysis (Murat): An Imaging Algorithm Designed for Volcanic Regions
CrossRef Full Text | Google Scholar
Numerically Calculated 3D Space-Weighting Functions to Image Crustal Volcanic Structures Using Diffuse Coda Waves
CrossRef Full Text | Google Scholar
Absorption and Scattering 2-D Volcano Images from Numerically Calculated Space-Weighting Functions
Google Scholar
Active High-Resolution Seismic Tomography of Compressional Wave Velocity and Attenuation Structure at Medicine Lake Volcano
CrossRef Full Text | Google Scholar
Understanding Seismic Path Biases and Magmatic Activity at Mount st helens Volcano before its 2004 Eruption
CrossRef Full Text | Google Scholar
García-Yeguas
High Resolution 3d P Wave Velocity Structure beneath Tenerife Island (Canary Islands
spain) Based on Tomographic Inversion of Active-Source Data
Google Scholar
CrossRef Full Text | Google Scholar
Deciphering the Evolution of Deception Island's Magmatic System
PubMed Abstract | CrossRef Full Text | Google Scholar
Seismic Imaging of Santorini: Subsurface Constraints on Caldera Collapse and Present-Day Magma Recharge
CrossRef Full Text | Google Scholar
Ibáñez
Database of Multi-Parametric Geophysical Data from the TOMO-DEC experiment on Deception Island
PubMed Abstract | Google Scholar
Ibáñez
The Tomo-etna experiment: an Imaging Active Campaign at Mt
Working-Plans and Involved Research Projects
Google Scholar
Studying Deep Sources of Volcanism Using Multiscale Seismic Tomography
CrossRef Full Text | Google Scholar
Global Quieting of High-Frequency Seismic Noise Due to COVID-19 Pandemic Lockdown Measures
PubMed Abstract | CrossRef Full Text | Google Scholar
CrossRef Full Text | Google Scholar
Antarctica): an Example of a Volcanic Caldera Developed by Extensional Tectonics
Google Scholar
Crustal Structure of the Alps as Seen by Attenuation Tomography
CrossRef Full Text | Google Scholar
Scattering and Absorption Imaging of a Highly Fractured Fluid-Filled Seismogenetic Volume in a Region of Slow Deformation
CrossRef Full Text | Google Scholar
Automatic Passive Data Selection in Time Domain for Imaging Near-Surface Surface Waves
CrossRef Full Text | Google Scholar
The 3D Attenuation Structure of Deception Island (Antarctica)
CrossRef Full Text | Google Scholar
From 2D to 3D Attenuation Tomography in Volcanoes: The Study of Tenerife (Canary Islands) and Deception Island (Antarctica)
3d Attenuation Tomography of the Volcanic Island of Tenerife (Canary Islands)
CrossRef Full Text | Google Scholar
Spatial Distribution of Intrinsic and Scattering Seismic Attenuation in Active Volcanic Islands - II: Deception Island Images
CrossRef Full Text | Google Scholar
Seismic Tomography: a Window into Deep Earth
CrossRef Full Text | Google Scholar
On the Use of Sensitivity Tests in Seismic Tomography
CrossRef Full Text | Google Scholar
Apasvo: a Free Software Tool for Automatic P-phase Picking and Event Detection in Seismic Traces
CrossRef Full Text | Google Scholar
Seismic Wave Propagation and Scattering in the Heterogeneous Earth
Germany: Springer Science & Business Media
Google Scholar
A Three-Dimensional Qp Imaging of the Shallowest Subsurface of Campi Flegrei Offshore Caldera
CrossRef Full Text | Google Scholar
Reservoir Structure and Hydraulic Properties of the Campi Flegrei Geothermal System Inferred by Audiomagnetotelluric
CrossRef Full Text | Google Scholar
New Insights into Seismic Absorption Imaging
CrossRef Full Text | Google Scholar
Geology and Geomorphology of Deception Island
Google Scholar
The 1969 Subglacial Eruption on Deception Island (Antarctica): Events and Processes during an Eruption beneath a Thin Glacier and Implications for Volcanic Hazards
CrossRef Full Text | Google Scholar
Local Source Vp and vs Tomography in the Mount St
Helens Region with the Imush Broadband Array
CrossRef Full Text | Google Scholar
Approaches to Automated Data Selection for Global Seismic Tomography
CrossRef Full Text | Google Scholar
Analysis of Multiple Scattering at Vesuvius Volcano
Using Data of the TomoVes Active Seismic experiment
CrossRef Full Text | Google Scholar
Scattering Behaviour at Merapi Volcano (Java) Revealed from an Active Seismic experiment
CrossRef Full Text | Google Scholar
Crustal Structure of Deception Island Volcano from P Wave Seismic Tomography: Tectonic and Volcanic Implications
CrossRef Full Text | Google Scholar
Seismic Reflections Reveal a Massive Melt Layer Feeding Campi Flegrei Caldera
CrossRef Full Text | Google Scholar
Citation: Guardo R and De Siena L (2022) Semi-Automated Inversion-Specific Data Selection for Volcano Tomography
Received: 05 January 2022; Accepted: 09 March 2022;Published: 25 April 2022
Copyright © 2022 Guardo and De Siena. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use
*Correspondence: L. De Siena , bGRlc2llbmFAdW5pLW1haW56LmRl
Your Ads Privacy ChoicesIMDb, an Amazon company© 1990-2025 by IMDb.com, Inc.
Zach Day might be the greatest Pocono athlete that you’ve never heard of.
The 19-year-old is competing on the popular TV show American Ninja Warrior, where he has become the youngest national finalist in the show’s 10 seasons.
“I expected to (do well), I knew I had the capability of doing it. At other competitions the pros are in, I beat them, so why couldn’t I do it here,” Day said.
Day was a typical child growing up, playing baseball and a handful of other sports but ninja-style contests caught his attention when he first saw American Ninja Warrior on TV. Day, who is from Northampton County, continued to watch the show until four years ago when he told his father, Brian, he wanted to quit and pursue ninja.
His father, who was also his baseball coach, was onboard with the decision and the two created a dream that Zach would one day compete on the TV show that inspired him years before.
“I started watching around ten years ago when it first came to the U.S. and then it took off from there,” Day said.
Day’s journey to competing on the TV show was just as unique as the competition itself.
To train for the unique competitions, Day built equipment in his backyard and works out at two gyms; one in Brodheadsville, the other in New Jersey. At the Brodheadsville gym, Freedom Gymnastics, is where Day spends the most time training and also teaches a ninja class for children.
The gym’s owner, Matthew Guardo, was a contestant on the show two years ago and trains with Day at least twice a week. While Day always dreamed of competing, the rules required entrants to be 21 years old, until this year when they changed the rule two weeks before the application deadline.
“He’s been living this for years, trying to get better and then two weeks before the applications were due, they opened it to 19-year-olds. He’s thinking ‘Alright, I got two years,’ then all of a sudden he’s got two weeks,” Guardo said.
Day applied and eventually learned he was one of the thousands of applicants chosen to compete in a regional event held in Philadelphia. Yet for Day, the moment he dreamed about was one marred with sadness he learned about his selection on the day of his father’s funeral.
The man, who coached him for years and had been his biggest supporter, passed away from a heart attack. While he is not present to watch him compete, Day knows his father would be proud of what he’s accomplished.
“He would obviously be super proud. It’s been our dream for, you know, over five years now and I know he’s up there looking down at me super proud,” Day said.
Despite being the youngest finalist, Day said that the age difference did not intimidate him. Day felt that his training regimen, in addition to cutting 10 pounds of weight, left him in top physical condition even among elite competitors.
Day, who stands about 5’6”, does not boast the body of a typical professional athlete, but that did not faze him when competing against top competitors – some of which are former professional athletes.
“I feel like I have an advantage over them, this is what I do. I consider myself professional at this, while they’re professional at their other thing,” Day said.
For Day, the past two months have been a waiting game when it comes to discussing his performance on the show. While the finals were filmed in Las Vegas during June, he is unable to discuss anything beyond what has aired on TV. The next round of the finals airs at 8 p.m. Monday, Sept. 10.
This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.
You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.
Material and Methods: A questionnaire was developed and sent by secure e-mail to 1,480 clinicians involved in ART worldwide. One hundred and forty-eighth clinicians from 34 countries returned completed questionnaires.
Results: Progesterone support is usually started on the day of oocyte retrieval. Eighty percent of clinicians applied the administration of vaginal progesterone only. Intramuscular progesterone was prescribed by 6%, while oral progestin or subcutaneous progesterone were each prescribed by 5% of clinicians, respectively. Progesterone was administered until 8-10 weeks' gestation by 35% and 12 weeks by 52% of respondents.
Volume 11 - 2020 | https://doi.org/10.3389/fendo.2020.00500
Background: Luteal phase support (LPS) in assisted reproduction cycles has been widely investigated in recent years
Although progesterone represents the preferential product for luteal phase supplementation in cycles with fresh embryo transfer
there is ongoing debate as to when to start
and whether there is a place for additional agents
fertility specialists do not always adhere to evidence-based recommendations in their clinical practice
The aim of this worldwide web-based survey is to document the currently used protocols for luteal phase support and appraisal tendencies of drug prescription behavior and to compare these to the existing evidence-based literature
Material and Methods: A questionnaire was developed and sent by secure e-mail to 1,480 clinicians involved in ART worldwide
One hundred and forty-eighth clinicians from 34 countries returned completed questionnaires
Results: Progesterone support is usually started on the day of oocyte retrieval
Eighty percent of clinicians applied the administration of vaginal progesterone only
Intramuscular progesterone was prescribed by 6%
while oral progestin or subcutaneous progesterone were each prescribed by 5% of clinicians
Progesterone was administered until 8-10 weeks' gestation by 35% and 12 weeks by 52% of respondents
Conclusions: Vaginal administration was the preferred route for luteal phase support
The reported emerging use of the oral route confirms the expected shift in clinical practice as a result of recent evidence showing a reassuring safety score of oral progestins
In spite of the lack of evidence supporting the continuation of luteal support until 12 weeks' gestation
this practice was adhered to by more than half of the clinicians surveyed
highlighting the difference between evidence-based medicine and real-life practices
Nevertheless, there is great variation in the duration of LPS in clinical practice: some clinicians discontinue LPS on the day of a positive hCG test, whereas others prefer to continue LPS until 12 weeks of pregnancy. Interestingly, there appears to be the tendency toward prolonging progesterone supplementation until 8–10 weeks following conception, in spite of a lack of available evidence in support of such a practice (26)
we set out to conduct a survey aiming to document the implementation of LPS protocols in clinical practice and to appraise tendencies of drug prescription behavior
We conducted a two-phase web-based survey sent to gynecologists/reproductive endocrinologists involved in ART
In the first phase of the survey (April-May 2017)
the questionnaire was sent to clinicians based in Tunisia
we decided to expand the survey internationally and to include clinicians involved in ART outside Tunisia
in order to increase the generalisability of the study data
All clinicians surveyed were members of ESHRE, world-renowned in vitro fertilization (IVF) practicing gynecologists and authors of papers in Q1-2 scientific reproductive medicine journals. The survey consisted of four questions regarding the use of progesterone for luteal phase supplementation in IVF/ICSI cycles. Questions are listed in Table 1
The questionnaires were sent via secure email and responses were collected securely by email or telephone contact
Invited participants who did not respond to the survey were not contacted again and no incentives were provided for participation
Data from both study phases were included for analysis
Our survey was conducted in agreement with the GDPR privacy policy
The survey only contains names and e-mail addresses of clinicians
patients' personal identifying information was excluded
The clinicians' personal identifying information and the survey data were securely stored in a dedicated database protected by password
These data will not be shared with any third parties
According to Bartlett et al. (27)
in order to obtain a sample of 110 subjects
considering a margin of error of 0.03 and alfa level of 0.05
we considered that our sample was appropriate to drag robust conclusions
Between April-May 2017 and August-October 2018, 1,480 clinicians received the survey. Of those, 148 from 34 different countries returned completed questionnaires yielding a response rate of 10%. The respondents were distributed as follows: 24 were based in Tunisia and there were 124 clinicians from 33 other countries worldwide. The geographical distribution of respondents is displayed in Supplementary Figure 1
When do you start luteal-phase support in IVF/ICSI cycle for fresh embryo transfer following hCG triggering
Seventy one percent (105/148) of the clinicians prescribed progesterone administration to their patients from the day of the oocyte retrieval onwards
LPS using progesterone was initiated on the day after the oocyte collection by 23.6% (35/148) of doctors
and 2.02% (3/148) started the progesterone supplementation 2 and 3 days after egg collection
Eighty percent (119/148) of the clinicians preferred to use the vaginal progesterone alone as LPS; 4% (6/148) of them used vaginal progesterone in association with intramuscular or oral progesterone. Intramuscular progesterone alone, was used by 6% (9/148) of doctors and oral progesterone by 5% (7/148) of doctors. The usage of the subcutaneous progesterone was reported by 5% (7/148) of clinicians (Table 2)
Distribution of progesterone routes according to the number of clinicians and dosage
Considering the total number of clinicians recurring to vaginal progesterone as LPS (80%; 119/148)
the most used formulation and dose for vaginal route were the vaginal tablets at doses of 600 mg/d (69.3 %; 103/119)
Lower doses of 200 or 400 mg/d were used by 10.7% (16/119) of doctors
Intra-muscular progesterone was equally used in dosage of 50/100 mg/d (8%; 12/148). Subcutaneous in dosage of 25 mg/d (5%; 7/148) and oral dydrogesterone in dosage of 20–30 mg/d (7%; 10/148) (Table 2)
How long do you continue the administration of progesterone during early pregnancy
Comparison between EBM on LPS and Survey results
Although our results are on a par with those previously published (12, 26, 28)
we observed that the intramuscular route for the administration of progesterone is still used by a significant percentage of gynecologists
the respondents of our survey reported an increasing uptake of oral dydrogesterone
it appears that LPS is often continued until 12 weeks of gestation worldwide
The favorable clinical outcomes after initiation of progesterone supplementation between the evening of the day of oocyte retrieval and day 3 after oocyte retrieval may be related to the inhibitory function of progesterone on uterine contractility in anticipation of the embryo transfer (ET) (29). However, administration of progesterone before oocyte retrieval has a detrimental impact on outcomes (24)
According to results of a Cochrane meta-analysis, hCG is not superior to progesterone for LPS; furthermore, analysis of pooled data pointed toward a higher risk of ovarian hyperstimulation syndrome when hCG was administered in the luteal phase (12–14)
The reported combination of progesterone via the vaginal route and an additional route
a regimen that has not been supported by any scientific evidence
may be linked to the potentially suboptimal adherence of some patients to the vaginal route; it has been hypothesized that clinicians may decide to add a different route on top of the vaginal one
in order to exclude the possibility of suboptimal administration
Considering the results of our survey, the subcutaneous route deserves to be mentioned since it is applied by 5% of clinicians. Indeed, the administration of subcutaneous progesterone is considered a valuable alternative to the vaginal and intramuscular route showing a similar efficacy and safety profile (16, 18, 35)
With respect to the duration of LPS, several studies support the continuation of progesterone supplementation until the ultrasound detection of fetal heart activity (36–40). Furthermore, robust scientific evidence exists to suggest that LPS should be administered at least until the pregnancy test (18, 25)
an explanation to this trend in a fresh ART cycle may be adopted from the increasingly used artificial endometrial preparation protocol (the so-called HRT cycle) for frozen embryo transfer
where extended luteal phase supplementation could be required because of the lack of endogenous progesterone production in the absence of a corpus luteum
the exact reason for the prescription of extended LPS is unknown
this survey indicates a trend toward extended LPS in ART cycles with fresh ET
which underscores an important difference between the available scientific evidence and clinical practice
although the data of our survey study illustrate global LPS prescription
they are a mere estimation of real clinical practice because the responses provided in the survey have not been verified by objective data
Our survey illustrates also that vaginal and intramuscular progesterone for LPS is still most commonly prescribed
although other subcutaneous and oral routes for LPS are starting to emerge
The datasets generated for this study are available on request to the corresponding author
The study was approved by the Ethical Committee of the University of Sfax
FD designed the study and wrote the manuscript
AR is responsible for the statistical analysis
and CB critically commented and substantially revised the manuscript
All authors participated in drafting the manuscript and approved the final version
The handling Editor declared a past co-authorship with one of the authors HT
The authors would like to express their gratitude to the responders for their participation to the survey
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fendo.2020.00500/full#supplementary-material
Effect of oral administration of dydrogestrone versus vaginal administration of natural micronized progesterone on the secretory transformation of endometrium and luteal endocrine profile in patients with premature ovarian failure: a proof of concept
PubMed Abstract | CrossRef Full Text | Google Scholar
A human in vivo model for the luteoplacental shift
Establishing full-term human pregnancies using cleaving embryos grown in vitro BJOG
Endometrial evaluation by aspiration biopsy on the day of oocyte retrieval in the embryo transfer cycles in patients with serum progesterone rise during the follicular phase
Impact of ovarian hyperstimulation on the luteal phase
PubMed Abstract | Google Scholar
Abnormal endometrial development occurs during the luteal phase of nonsupplemented donor cycles treated with recombinant follicle-stimulating hormone and gonadotropin-releasing hormone antagonists
The luteal phase and early pregnancy after combined GnRH-agonist/HMG treatment for superovulation in IVF or GIFT
doi: 10.1093/oxfordjournals.humrep.a136750
Luteal phase support with 17α-hydroxyprogesterone versus unsupported cycles in in vitro fertilization: a comparative randomized study
Endometrial pinopodes indicate a shift in the window of receptivity in IVF cycles
Reproductive biology and IVF: ovarian stimulation and endometrial receptivity
Luteal phase support for assisted reproduction cycles
Evaluation of an optimal luteal phase support protocol in IVF
Luteal phase support in assisted reproduction cycles
CrossRef Full Text | Google Scholar
Oral progestogen versus intramuscular progesterone for luteal support after assisted reproductive technology treatment: a prospective randomized study
Subcutaneous progesterone is effective and safe for luteal phase support in IVF: an individual patient data meta-analysis of the phase III trials
Comparison the effectiveness of oral dydrogesterone
vaginal progesterone suppository and progesterone ampule for luteal phase support on pregnancy rate during ART cycles
Google Scholar
ESHRE Reproductive endocrinology guidelines group
Ovarian stimulation for IVF/ICSI-Guideline of the European Society of Human Reproduction and Embryology
Effects of vaginal progesterone administration on uterine contractility at the time of embryo transfer
Delaying the initiation of progesterone supplementation results in decreased pregnancy rates after in vitro fertilization: a randomized
Effects of vaginal progesterone administration starting on the day of oocyte retrieval on pregnancy rates
Timing luteal phase support in GnRH agonist down-regulated IVF/embryo transfer cycles
Effect of the initiation of progesterone supplementation in in vitro fertilization–embryo transfer outcomes: a prospective randomized controlled trial
Administration of progesterone before oocyte retrieval negatively affects the implantation rate
Short versus extended progesterone supplementation for luteal phase support in fresh IVF cycles: a systematic review and meta-analysis
Luteal-phase support in assisted reproduction treatment: real-life practices reported worldwide by an updated website-based survey
Determining appropriate sample size in survey research
28. Ivf-worldwide. A follow-up survey on luteal-phase progesterone support (2020). Available online at: https://ivf-worldwide.com/survey/a-follow-up-survey-on-luteal-phase-progesterone-support/results-a-follow-up-survey-on-luteal-phase-progesterone-support.html (accessed April 16
Dydrogesterone vs progesterone for luteal-phase support: systematic review and meta-analysis of randomized controlled trials
An update of luteal phase support in stimulated IVF cycles
A Phase III randomized controlled trial comparing the efficacy
safety and tolerability of oral dydrogesterone versus micronized vaginal progesterone for luteal support in in vitro fertilization
(2017) 32:1019–27 doi: 10.1093/humrep/dex023
Oral dydrogesterone versus intravaginal micronized progesterone gel for luteal phase support in IVF: a randomized clinical trial
A reduction in public funding for fertility treatment - an econometric analysis of access to treatment and savings to government
Subcutaneous progesterone versus vaginal progesterone gel for luteal phase support in in vitro fertilization: a noninferiority randomized controlled study
Progesterone supplementation during early gestations after IVF or ICSI has no effect on the delivery rates: a randomized controlled trial
Prospective randomized study comparing luteal phase support for ICSI patients up to the first ultrasound compared with an additional three weeks
(2008) 23:857–62 doi: 10.1093/humrep/den012
Duration of progesterone-in-oil support after in vitro fertilization and embryo transfer: a randomized
Does cessation of progesterone supplementation during early pregnancy in patients treated with recFSH/GnRH antagonist affect ongoing pregnancy rates
Early progesterone cessation after in vitro fertilization/intracytoplasmic sperm injection: a randomized
The optimal duration of progesterone supplementation in pregnant women after IVF/ICSI: a meta-analysis
De Vos M and Blockeel C (2020) Luteal Phase Support in IVF: Comparison Between Evidence-Based Medicine and Real-Life Practices
Received: 18 January 2020; Accepted: 23 June 2020; Published: 18 August 2020
Copyright © 2020 Di Guardo, Midassi, Racca, Tournaye, De Vos and Blockeel. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY)
*Correspondence: Federica Di Guardo, ZmVkZXJpY2EuZGlndWFyZG9AdXpicnVzc2VsLmJl; ZmVkaWd1YXJkb0BnbWFpbC5jb20=
Link IconCopy linkFacebook LogoShare on FacebookXShare on XEmailShare via EmailLink copied to clipboardVillanova graduates a record number of female engineersCalling a typical American engineering school a boys' club would be an understatement - on average
women make up 18.2 percent of engineering undergraduates nationwide
Calling a typical American engineering school a boys' club would be an understatement - on average
It's a statistic that hasn't gone unnoticed
with colleges and universities across the country scrambling to draw more women and minorities into engineering majors
Villanova University is no exception - and on Sunday
31.4 percent of the engineering students who crossed the stage at graduation in Radnor were female
women made up just 19 percent of the engineering school's graduating class
Officials say that spike in female graduates - the university's largest ever - is the result of a strategy adopted in 2006 by College of Engineering dean Gary Gabriele
It involved reaching out to high school students before they even applied
targeting girls strong in math and the sciences who may not have even considered an engineering major
Getting them to think about engineering is the key thing," Gabriele said
It also involved hiring more female faculty members
"I think one of the biggest things is providing role models," said Amy Fleischer
a Villanova engineering professor who earned her undergraduate degree from the university in 1991
"The more you can get women in the field - being role models and professor
putting them in front of middle schoolers and high schoolers - the more you can really see yourself wanting to pursue that profession."
Fleischer didn't have a single female engineering professor
She drew support instead from friends in the field
women who were bucking trends long before universities began concerted efforts to attract women to math and science fields
"The more people you can get contributing your ideas - it just brings a different perspective to the workplace
"You've got a much better perspective now."
women going into engineering at Villanova say next to no one is surprised they're interested in the field
Many are following in the footsteps of mothers or older sisters
And Villanova's trend toward a more diverse engineering school is holding - the school's incoming freshman class in 2012 was also 31 percent female
"It's definitely a really great field to get into - it just opens so many doors for you," said Rebecca Weigand
"It's not as intimidating as people make it out to be."
Weigand is staying at Villanova to complete a graduate degree - "grad school gets even smaller for female engineers
but I've never been intimidated by that," she said
"You meet a few people along the way that question why you're there," said Hillary Guardo
who will start a nuclear reactor engineering job with the Navy after graduation
you'll meet more people out there who are excited to have women diving in."
Freedom Gymnastics on Route 209 in Brodheadsville has been in the forefront of aspiring gymnasts in the Poconos for more than a year
competitive gymnastics and cheerleading under director Matt Guardo of Stroudsburg
last month hosted its first United States Association of Independent Gymnastics Clubs competition
pitting 54 gymnasts from four teams in Pennsylvania and New Jersey
but always reach for the stars," remains the motto of the program
Formerly a part of the Elite Dance and Gym Center
the facility later moved in late 2012 into a building of its own at 116 Pilgrim Way
across from the Western Pocono Community Library
who works Lead Technical Consulting Engineer at AT&T
decided to become fully involved with the center when it was in danger of closing
first joined the facility as a partner and then took over the center when they moved to their new facility in Pilgrim Way
Eight USAG certified professional instructors coach around 200 gymnasts in various age groups and skill levels in a 14,000-square-foot center year round
also known as "Polo" in gymnastics circles
"The coaches helped me a lot in setting up the facility and expanding the programs," Guardo said
Students are grouped based on their ages and the skill levels and can learn each of the four events — floor exercise
The "Baby Bears," also known as 'Mommy and me' classes
consists of toddlers from 18 months to three years
involves music and movement exploration as part of the curriculum
The "Mighty Bears" consist of 3- to 5-year-olds in a more skill oriented approach
Adult classes focus on adults who want to develop their core and flexibility
"It's not about age; it's about attitude," says Guardo
who also takes adult classes to learn new skills
"It is an excellent way to stay in shape and stay fit."
Guardo calls the classes a little challenging
but encourages the participants to stick with it to improve upper body strength and mobility over time
"It is about challenging yourself physically and mentally," said Guardo
who notes that there was a 60-year-old gentleman who took classes for recreation
Those who have never done gymnastics or had very little gymnastics experience take beginner classes while the intermediate classes involve skills such as cartwheel
The advanced class participants are well-versed in back walkover and back handspring with a light spot
The center boasts having the most competitive team in the area
For those who like to progress beyond recreational classes
there is the Pre-Team/Developmental Team and USAG competitive teams for levels 2 to 7 and USAIGC competitive teams for levels copper
is also offered to improve and develop skills
Cheerleading groups from schools and competitive cheerleading teams from around the Poconos brush up on group tumbling
The five areas of emphasis include tumbling
Tumbling Advanced takes it to a higher level
There are back handspring and cheerleading clinics
Programs are also offered for special needs children
"Each child is evaluated to see what their needs are and their strength is," said instructor Jessica Holmes
who has been working with three special needs children
stretching and extending their limbs are part of their routine
helps them to socialize better and helps the children get over fear."
Holmes said although some special needs children are hesitant starting off
they feel better once they get comfortable with the surroundings and the routines make them want to return
"They are not excluded from anything," she said
Summer camps run for a week divided into teams
Space is also rented for birthday parties where visitors can use equipment for the day
Parents can watch their children's program from a viewing area upstairs
call 570-992-3733 or visit Freedomgymnastics.com
Jose Quintana Guardo, a prominent figure on social media, has been captivating his followers with snapshots of his stunning and charming wife. Each picture shared by Quintana Guardo showcases his wife's beauty and charisma, leaving viewers in awe of her radiant smile and elegant presence.
Set against various backdrops, Quintana Guardo's wife exudes grace and confidence, effortlessly showcasing her unique style and personality. Her captivating allure shines through in every image, drawing viewers into the world of their beautiful relationship.
Whether posing together in loving embraces or caught in candid moments, Quintana Guardo's wife never fails to mesmerize with her undeniable charm. The pictures shared by Quintana Guardo are a testament to the deep love and admiration he holds for his wife, offering a glimpse into the bond they share.
Viewers are not only captivated by the stunning visuals but also inspired by the evident connection between Quintana Guardo and his wife. The images serve as a reminder of the beauty of love and the joy found in sharing life's moments with a cherished partner.
Quintana Guardo's social media feed has become a source of delight for many, as followers eagerly anticipate each new snapshot of his captivating wife. Through these images, Quintana Guardo invites viewers to witness the magic of their relationship and the beauty that radiates from his beloved wife.
PINOY INVENTOR. Jose Guardo Jr, inventor and chief maglev architect of the Hybrid Maglev Monorail Train shows a video presentation on how it will solve the traffic problem in the Philippines without using too much energy. The maglev (magnetic levitation) train is made of permanent magnet and aluminum material of which the materials can be found in the country. (Ace R. Morandante/davaotoday.com)
DAVAO CITY – The Filipino inventor of the hybrid monorail – which uses magnets – believes that his invention is the cheaper way to solve the traffic problem in the country.
Architect Jose Guardo, Jr. in a press conference on Monday said maglev or magnetic levitation train “is a technology made of lightweight materials which uses electromagnets and neodymium iron boron to create repulsions from the lower part and enable the train to levitate and propel the coach”.
He said Japan and Germany are the first to use this technology.
Japan, Guardo said, has broken the record of 603 kilometers per hour. He said in Shanghai, China, where they use Germany’s invention, the 30-kilometer travel from Pudong International Airport to Lin Yang station “only takes eight minutes running at 430 kilometers an hour.”
“In our invention, we don’t aim for high speed yet because our stations are nearer. Probably we can make it 300 kilometers an hour when traveling long distance. But between station to station, it’s just 65-85 kilometers an hour,” he said.
Guardo said the Filipino’s version of the maglev train is cheaper than that of Germany, which costs US$40.9 million per kilometer of the rail.
“Here we use, lightweight materials like carbon fiber and permanent magnet and aluminum for levitation which is only US$2 million per kilometer,” he said.
Guardo said even the materials needed for the construction of the Hybrid Maglev Monorail Train can be sourced locally.
“Kining nga magnet kusog kaayo ni siya, magnet neodymium iron boron. 60 percent sa magnet is made of iron. Naa ra sa atong tugkaran, naa sa Surigao, Dinagat, nasa Zambales sa Palawan kaning mga mineral resources ani kinahanglan sa atong magnet (This magnet neodymium iron boron is very strong. 60 percent of magnet is made from iron which is found in Surigao, Dinagat, Zambales and Palawan),” he said.
“I use aluminum for levitation because it is cheaper and it is the most abundant element on earth. The neodymium iron boron is 60 percent iron, which is found in Surigao and is mined by China,” said Guardo.
“The buying rate of high grade (nickel) which has 70 percent iron costs US$9 per ton,” he said.
“This really is beneficial because we don’t need to import the train. The trains from China costs US$1.8 million per coach,” Guardo said.
Guardo also said that Maglev train is more low-maintenance because of its materials. He said the Metro Rail Transit’s cost of maintenance can cost US$1 million per month while the Maglev train’s cost of maintenance is pegged at P5 million pesos a month.
“Maglev train levitates, so it requires less energy to propel the train,” he said.
He also said that they are proposing that the station here in Davao will use solar power for the train.
Guardo’s team proposes to put up three loops in Davao namely Ecoland loop, airport loop and the downtown loop. The loop he said will help the train avoid occupying the road right of way.
He said the monorail train “will only travel one way, either clockwise or counterclockwise depending on the situation.”
He also said that unlike the MRT, the supporting structure of the monorail train will only measure one meter by one meter and the rail 1.5-2 meters.
A transportation study by the Japan International Cooperation Agency last year said that traffic congestion in Metro Manila can worsen by 2030 which can cost the Philippine economy P6 billion a day if not addressed.
Guardo said the project is recognized by the Department of Science and Technology 11 and is now planning to have a prototype to test the technology.
He said the prototype only costs P300 million.
Virgilio Sangutan, president of the Davao Inventors Association, said there is a plan now to utilize five hectares of the Mindanao Science Centrum in Bago Oshiro Tugbok district to design five stations. He said a coach of a Maglev train will be used to transfer visitors from a station to another.
Sangutan said the coach can carry 50 passengers.
Eduard Geguera, operation manager of the project said they have already formed a group of support team composed of electrical engineers and mechanical engineers who are all from Davao City.
He said they already sent their letter proposal to Davao City Mayor Rodrigo Duterte and are still waiting for feedback.
“We also requested documents from the City Planning because there have been feasibility studies that were already conducted, and it is where we will base our design for elevation,” said Geguera.
Guardo said “we can really claim that this is a Filipino invention. I am sure this can create jobs because we (are creating) a new industry.”
He said once validated, “we can also export this to other countries.” (davaotoday.com)
when I look at themShine just like mineBut I can't understandWhat are they about[Coro]But if you find me one dayAnd now you think differentI'll save you a bit of faithTo open the eyes and see youBut if you find me one dayAnd now you think differеntI'll save you my morning lightMy eyes
my lovе and my pillowYou might also like[Verso 2]I have two pending kissesOne for each cheekAnd a crystal abyssFor each injuryI have the missing spaceThat your hug would occupyIf we were given the caseOf seeing each other far from people[Pre-Coro]I have the life too shortAnd
the decent lookAnd I don't mind thinkingThe impossibility of having you[Coro]But if you find me one dayAnd now you think differentI'll save you a bit of faithTo open the eyes and see youBut if you find me one dayAnd now you think differentI'll save you my morning lightMy eyes
my love and my pillowEmbedCancelHow to Format Lyrics:
To learn more, check out our transcription guide or visit our transcribers forum
Find answers to frequently asked questions about the song and explore its deeper meaning
POLITIKO | politiko.com.ph
Councilor Jerry Guardo proposed an ordinance mandating electric scooter (e-scooter) or bike (e-bike) drivers in Cebu City to wear protective helmets and reflectorized stickers/vest/lights
Guardo’s proposal entitled “E-scooter and Bike Helmet and Reflectorized Ordinance” was referred to the Committee on Laws
Under the new normal brought on by the coronavirus pandemic
bicycles and e-scooters/e-bikes have become a necessity for people who commute in the city
Section 4 of the proposed ordinance provides that all e-scooter and bike drivers shall at all times wear protective helmets and wear reflectorized vest/stickers/lights while driving on any type of road and highway within the city
Any person driving an e-scooter or e-bike on any road in the city shall drive the same at a careful and prudent speed of not more than 30 kilometers per hour
and of any other condition then and there existing
The violators will be penalized with a fine of P1,500 for the first offense; P3,000
second offense; and P5,000 and confiscation of the e-scooter/bike
“The increasing numbers of accidents involving e-scooters or bikes within the City of Cebu compromise the maintenance of peace and order and the promotion of public security and safety necessary for the advantage of the general welfare of the people,” the proposed measure read
Engage in thought-provoking discussions and connect with like-minded individuals.