Tokyo, Oct 8 (TIWN) An earthquake with a magnitude of 6.1 on the Richter Scale on late Thursday struck Japan's Tokyo region, 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. 

According to utility officials, as of around 11:00 p.m. local time, the earthquake had triggered a blackout affecting around 250 households in Tokyo. 

Some train services including subways operated by Tokyo Metro Co. and shinkansen bullet trains had been suspended following the earthquake, railway companies said.