TOKYO, June 11 (XinhuaNET) -- An earthquake registering an estimated magnitude of 5.4 on the Richter scale jolted southern parts of north Japan's Hokkaido Prefecture early Friday, the Japan Meteorological Agency said.

    There were no immediate reports of casualties or damage from the 3:12 a.m. (1812 GMT) quake, which measured 3 on the Japanese seismic intensity scale of 7.

    The epicenter was about 60 kilometers underground in the southern Tokachi region in Hokkaido, Japan's northernmost main island, the agency said. Enditem