A moderate magnitude 4.1 earthquake occurred in the Sea of Japan 233&nbsp;km (145&nbsp;mi) from &nbsp;<a href="earthquakes/japan.html">Japan</a> in the afternoon of Friday
The quake had a great depth of 440&nbsp;km (273&nbsp;mi) and was not felt (or at least not reported so)
A strong magnitude 5.2 earthquake hit 31&nbsp;km (20&nbsp;mi) away from <a href="place/9827/earthquakes/nagano.html">Nagano</a>, <a href="earthquakes/japan/nagano.html">Nagano</a>, &nbsp;<a href="earthquakes/japan.html">Japan</a>
The depth of the quake could not be determined
but is assumed to be shallow.The earthquake was felt over a large region.
The shallow depth of the quake caused it to be felt more strongly near the epicenter than a deeper quake of similar magnitude would
A light magnitude 3.2 earthquake hit 26&nbsp;km (16&nbsp;mi) away from <a href="place/16798/earthquakes/nanao.html">Nanao</a>, <a href="earthquakes/japan/ishikawa.html">Ishikawa-ken</a>, &nbsp;<a href="earthquakes/japan.html">Japan</a>
The quake had a very shallow depth of 7.5&nbsp;km (4.7&nbsp;mi) and was not felt (or at least not reported so).