Okinawa Region

a) An M5.9 fairly deep-focus earthquake occurred on 29 January in the East China Sea.

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

Seismic Activity in Japan January 2000