Tohoku Region

a) An M4.5 earthquake occurred on 13 September in the Mihachikamikita area of Aomori Pref. (maximum intensity: 3).

Also, though it is outside our time frame, an M5.6 earthquake occurred on 3 October offshore of Iwate Pref. (maximum intensity: 3).

Japan Meteorological Agency,Science and Technology Agency

Seismic Activity in Japan September 1999