An earthquake measuring 5.0 on the Richter scale jolted 2 km SSW of Ushiku, Japan, at 05:25:14 GMT on Sunday, the U.S. Geological Survey said. The epicenter, with a depth of 65.86 km, was initially determined to be at 35.9449 degrees north latitude and 140.1241 degrees east longitude. There were no immediate reports of injuries or damage, and no tsunami warning was issued, according to the NHK public broadcaster.