A 6.9 magnitude earthquake struck off the coast of Honshu, Japan near the location of last year's deadly quake and tsunami. Six large aftershocks have occurred so far in at or near the epicenter ranging from 6.1 down to 4.6.  More quakes shook the Tokyo region later in the day. The quakes off the coast of Honshu generated a small 8-inch high tsunami. No damage was reported.