Underground Explosion in Japan? they live2 Uncategorized June 1, 2020 1 Minute M 5.3 – 11 km SE of Okunoya, Japan 2020-05-31 21:02:10 (UTC)36.217°N 140.510°E90.3 km depth The depth is 90km, quite deep. But the seismogram shows Explosion rather than Earthquake. If you cannot find P waves, it should NOT earthquake. Share this:TwitterFacebookLike this:Like Loading... Related Published by they live2 View all posts by they live2 Published June 1, 2020