M5.6 offshore Tokyo
Posted by Island Chris on April 17, 2013 at 07:47:22:

The Japan region has been active lately with aftershocks and other quakes not in the M9 rupture area (including a large deep quake related to the subduction beneath Russia.

But now there has been a M5.6 at 42 km depth beneath the Bay offshore Tokyo. Might want to compare to 1923 to see if on same structure.

Chris