Kinki-Chugoku-Shikoku Region

a)On April 28, there was an M4.2 event (maximum seismic intensity: 3) in the Philippine Sea Plate in the northern part of Wakayama Prefecture.
b)On April 15 in the southern part of Wakayama Prefecture, an M4.8 event (maximum seismic intensity: 4) occurred in conjunction with the subduction of the Philippine Sea Plate.
c)On April 11, a shallow M4.0 event (maximum seismic intensity: 3) occurred in the Kii Suido channel (Hinomisaki).

Note: Within square brackets ([ ]) is the epicenter place name used by the Meteorological Agency in its information releases.

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,Science and Technology Agency

Seismic Activity in Japan April 2000