Location: 221 km ESE of Ishinomaki, Japan Period: 7 Dec 2012 08:18:23 - 7 Dec 2012 23:00:00 (14 hours 41 minutes) Volcanoes in 100km radius: None Earthquakes: 10 4 swarms found nearby. 2011 PS20110311.6(59.5km) 11 Mar 2 days 8 hours 50 earthquakes PS20110315.2(39.9km) 15 Mar 1 day 17 hours 6 earthquakes PS20110325.1(13.6km) 24 Mar 20 hours 6 earthquakes 2012 S20121207.1(1.8km) 7 Dec 1 day 20 hours 39 earthquakes