Location: M 8.1 2003 Tokachi-Oki Earthquake Magnitude: 8.1 Time: 25 Sep 2003 19:50:06 Depth: 27.0 There are 3 swarms found nearby. 2003 PS20030925.1 25 Sep 1 day 0 hours 14 earthquakes PS20030928.1 27 Sep 2 days 15 hours 13 earthquakes 2004 PS20041114.1 14 Nov 1 hours 5 earthquakes