Magnitude 6.1 Earthquake Rattles Tokyo

DEVELOPING:  TOKYO -- A 6.1 magnitude earthquake struck Japan late Thursday, shaking buildings in the capital Tokyo, the US Geological Survey said.

The quake struck at 10:37 p.m. local time in Chiba prefecture 40 miles east of Tokyo, at a depth of 26.7 miles.

Japan has been hit by a string of aftershocks since the 9.0 magnitude earthquake that struck March 11, unleashing a huge tsunami.