The number of aftershocks in the Miyagi prefecture was frequent during the six weeks after the earthquake, and the second peak was noted as a large aftershock on 7 April 2011 (magnitude of 7.0).

CAMP ZAMA, Japan (April 26, 2012 ... year anniversary of when a 9.0-magnitude earthquake struck off the northeast coast of Japan on March 11, 2011, and the resulting tsunami killed more ...