Kanto-Chubu Region


a) On 3 June, there was an M6.0 event (maximum seismic intensity 5 lower) in northeastern Chiba Prefecture (near Inubozaki) in conjunction with the subduction of the Pacific Plate.
b) At about 7:30 p.m. on 26 June the first perceptible earthquakes were recorded in the sea near Miyakejima, followed by events of M5.6 (maximum seismic intensity 4) and M5.2 (maximum seismic intensity 5 lower) on 29 June.
c) On 5 June, there was seismic activity including a maximal M4.7 shallow event (maximum seismic intensity 3) in the Reinan region of Fukui Prefecture,
d) On 7 June, there was seismic activity including a maximal M6.1 shallow event (maximum seismic intensity 5 lower) in the sea off Ishikawa Prefecture.

Also, although they occurred outside of the area under consideration, on 10 June there were deep events of M6.1 and M6.5 (at respective depths of 500 and 530 km) in the sea of Tokaido.

Furthermore, although they occurred outside of the time period under consideration, there were events of M6.4 and M6.1 on 7/1 and 7/9 in the sea to the east of Kozushima [in the sea near Niijima-Kozushima].


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 June 2000