Aftershock Distribution of the 2011 off the Pacific Coast of Tohoku Earthquake

The upper figure shows the epicenters of the main shock and aftershocks (from 12:00 (JST) on March 11, 2011 to 07:00 on March 13, shallower than the depth of 90 km, M of 5.0 or over).

The lower figure shows the time-space plot along the A-B side in the rectangular area of the upper figure.

Japan Meteorological Agency
[The 2011 off the Pacific Coast of Tohoku Earthquake (March 13, 2011)]