Okinawa Region

a)On April 26, there was a moderately deep-focus M4.9 event at a depth of 140 km in the East China Sea.
b)On April 10, there was seismic activity including an M4.2 event (maximum seismic intensity: 3) in the sea near Iriomotejima Island.

Note:
M=magnitude
N: total number of events in the figure
depth=depth of hypocenter
UND=Earthquakes of less than M1.0 and earthquakes whose magnitude was not recorded.
The key to the symbols shows on the left the size of an earthquake and on the right the depth of the hypocenter.

Japan Meteorological Agency