An earthquake measuring 6.7 on the Richter scale jolted 110km NNW of Nago, Japan at 20:11:22 GMT on Sunday, the U.S. Geological Survey said, but no tsunami was expected. The epicenter, with a depth of 112.34 km, was initially determined to be at 27.4194 degrees north latitude and 127.3648 degrees east longtitude. A tsunami was not expected, the National Weather Service's Pacific Tsunami Warning Center said.