Hokkaido Region

a) On 13 June, there was an M4.6 event (maximum seismic intensity 4) in the sea off Kushiro in conjunction with the subduction of the Pacific Plate.
b) On 9 June, there was an M3.8 event in the sea off Matsumae.


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