Baku, May 17, AZERTAC An earthquake with a magnitude of 6.1 struck off Japan's Hokkaido Prefecture on Sunday, the Japan Meteorological Agency (JMA) according to the Japan Meteorological Agency (JMA), Xinhua reports. The temblor occurred at around 0:24 p.m. local time, with its epicenter at a latitude of 41.9 degrees north and a longitude of 144.9 degrees east, and at depth of 60 km.The quake logged 3 in some parts of Hokkaido Prefecture on the Japanese seismic intensity scale which peaks at 7.So far no tsunami warning has been issued.