Source?
It was just on Foxnews.
FNC just reporting on this
I think they said it was a 6.1 quake
Probably somewhere underground.
Tokyo, Nearby Chiba Region, Shaken By Earthquake at 7:22 AM
April 11 (Bloomberg) -- An earthquake jolted central Japan around Tokyo this morning, rocking buildings in the city's center.
The quake, which struck at 7:22, local time, had a magnitude of 6.1, Japan's Meteorological Agency said, according to the Japanese standard.
There was no danger of tsunami, the powerful ocean waves caused by seismic activity, the agency said.
The two runways at Tokyo's Narita international airport are closed for inspection after the temblor, NHK reported.
http://www.bloomberg.com/apps/news?pid=10000101&sid=afeG2Spd4lSM&refer=japan