From: Seismicity near the hypocenter of the 2011 off the Pacific coast of Tohoku earthquake deduced by using ocean bottom seismographic data
Lat. (°N)
Lon. (°E)
Dep. (km)
Del. from JMA (km)
Az. to JMA (°)
Mainshock
38.0919
142.7897
28
6
258
Largest foreshock
38.2477
143.1164
23
14
279