UPDATE: All tsunami watches and warnings have expired. There are currently no reports of casualities following the latest quake, according to the National Police Agency.
The Tokyo Electric Power Company reported that workers briefly evacuated the Fukushima Dai-ichi nuclear plant following the
quake. However, the company said the plant reported no loss of power or major damage.
The quake was centered about 25 miles under water, 60 miles from Sendai and 90 miles from Fukushima where workers have been struggling to cool nuclear reactors.
Buildings in Tokyo, 215 miles from the epicenter, shook for about a minute.
Japan has been rocked by hundreds of aftershocks since a 9.0 magnitude earthquake devastated the country on March 11. However, very few have been stronger than 7.0.