A strong magnitude 6.3 earthquake occurred at 00:05:03 (UTC) on Friday, June 03, 2011, off the east coast of Honshu, 270 km East of Iwaki, at a depth of 31 km.
Japan's 11 March mega-quake shifted the ocean floor sideways by more than 20m, according one instrument placed on the seabed off the nation's coast. This direct measurement exceeds the displacement suggested by some models built only from data gathered on land. The figure was recorded by the Japan Coast Guard which maintains underwater geodetic equipment along the fault responsible for the giant tremor. Read more
A strong magnitude 6.2 earthquake occurred at 23:35:53 (UTC) on Friday, May 13, 2011, near the east coast of Honshu, 59 km NE of Iwaki,, at a depth of 37.6 km.
A strong magnitude 6.0 earthquake occurred at 10:12:48 (UTC) on Saturday, April 23, 2011, near the east coast of Honshu, 161 km ESE of Morioka, at a depth of 38.9 km.
A strong magnitude 6.1 earthquake occurred at 13:37:03 (UTC) on Thursday, April 21, 2011, off the east coast of Honshu, 64 km East of Tokyo, at a depth of 42.9 km.
A strong magnitude 6.0 earthquake occurred at 01:54:41 (UTC) on Thursday, April 21, 2011, off the east coast of Honshu, 187 km East of Hachinohe, at a depth of 7 km.
A strong magnitude 6.1 earthquake occurred at 19:57:23 (UTC) on Wednesday, April 13, 2011, off the east coast of Honshu, 190 km East of Morioka, at a depth of 11.2 km.
A strong magnitude 6.0 earthquake occurred at 05:07:42 (UTC) on Tuesday, April 12, 2011, in the eastern Honshu region, 27 km WNW of Iwaki, at a depth of 10.6 km.
A strong magnitude 6.4 earthquake occurred at 23:08:16 (UTC) on Monday, April 11, 2011, near the East coast of Honshu, 77 km ESE from Tokyo, at a depth of 13.1 km.
A major magnitude 7.1 earthquake occurred at 08:16:13 (UTC) on Monday, April 11, 2011, in the eastern Honshu region, 38 km West from Iwaki, Honshu, at a depth of 13.1 km.