Hokkaido Region

a) An M5.4 earthquake occurred on 10 September in the vicinity of Urup Island [Chishima Islands].

b) An M5.1 earthquake occurred on 21 September in the vicinity of Urup Island [Chishima Islands].

c) An M5.1 earthquake occurred on 27 September in the vicinity of Etorofu Island.

d) An M5.2 deep-focus earthquake occurred on 23 September northeast offshore of Hokkaido.

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

Japan Meteorological Agency,Science and Technology Agency

Seismic Activity in Japan September 1999