TOKYO, Oct. 7 (Xinhua) -- An earthquake with a magnitude of 6.1 on late Thursday struck Japan's Chiba Prefecture, but no tsunami warning has been issued, according to the Japan Meteorological Agency (JMA).
The temblor occurred at around 10:41 p.m. local time, with its epicenter at a latitude of 35.6 degrees north and a longitude of 140.1 degrees east, and at a depth of 80 km.
The quake logged 5 plus in some parts of Tokyo Prefecture and Saitama Prefecture on the Japanese seismic intensity scale which peaks at 7.
A task force to assess and monitor the earthquake's impact has been set up at the prime minister's office.
According to prefectural government officials, no abnormalities have so far been detected at Japan Atomic Power Co.'s Tokai No. 2 nuclear power plant in Ibaraki Prefecture near Tokyo.
There were no reports of damage at Narita airport in Chiba east of Tokyo after the strong quake.
However, some train services including subways operated by Tokyo Metro Co. and shinkansen bullet trains had been suspended following the earthquake, railway companies said. Enditem