July 10, a 7.3 quake hit the same area that experienced a 9.0 quake on March 11.

Two meter high (6.4 feet) waves were seen on the coasts of Miyagi and Iwate Prefectures.

Officials with Japan’s Meteorological Agency say this latest aftershock resulted from the Pacific Plate shifting horizontally.  They believe more aftershocks in the 7 range could occur, into next year.