A felt earthquake (M 3.5) occurred under Sapporo city on January 23, 1985. Recalculation of the earthquake hypocenter assigned the parameters: origin time = 07h33m07.8s, latitude = 42 59.1 N, longitude = 141 22.6 E, depth = 11 km. One of the best focal mechanism solutions shows a P-axis dipping 25 toward N64 R. A questionnaire survey was carried out on this earthquake and distribution of seismic intensity was determined from ninety two answers of dwellers in Sapporo and its environs. Felt area extends to mountain area in the southwest of Sapporo and to Ishikari town in the north of Sapporo. An area of intensity 2 in JMA scale was found near the epicenter, Toyohira-ku in Sapporo.
In its Geophysical Bulletin of Hokkaido Univ
- Pub Date:
- October 1985
- Position (Location);