Location: M 7.7 272 km ESE of Kamaishi, Japan Magnitude: 7.7 Time: 11 Mar 2011 06:25:50 Depth: 18.6 There are 4 swarms found nearby. 2011 PS20110311.1 11 Mar 1 day 14 hours 28 earthquakes PS20110325.1 24 Mar 20 hours 6 earthquakes 2012 PS20121207.1 7 Dec 14 hours 10 earthquakes S20121207.1 7 Dec 1 day 20 hours 39 earthquakes