Location: 204 km E of Iwaki, Japan Period: 11 Mar 2011 05:55:45 - 13 Mar 2011 14:41:20 (2 days 8 hours 45 minutes) Volcanoes in 100km radius: None Earthquakes: 50 5 swarms found nearby. 2011 PS20110311.8(95.5km) 11 Mar 9 hours 5 earthquakes PS20110315.2(92.3km) 15 Mar 1 day 17 hours 6 earthquakes PS20110325.1(71.9km) 24 Mar 20 hours 6 earthquakes 2012 PS20121207.1(59.5km) 7 Dec 14 hours 10 earthquakes S20121207.1(58.5km) 7 Dec 1 day 20 hours 39 earthquakes