Associated Press reported within the last ten minutes:
Officials at the tsunami-ravaged Fukushima Dai-ichi nuclear plant said there was no immediate sign of new problems caused by the aftershock. Japan’s nuclear safety agency says workers there have retreated to a quake-resistant shelter in the complex.
No one there was injured. Plant operator Tokyo Electric Power Co. said it evacuated two workers there and seven at a sister plant to the south that was not badly damaged.