NEW YORK, Jan. 7 (Xinhua) -- An earthquake of 5.0 magnitude jolted 128 km east of Arzak in China at 16:22:31 GMT on Sunday, the U.S. Geological Survey said.

The epicenter, with a depth of 6.05 km, was initially determined to be at 39.8223 degrees north latitude and 77.603 degrees east longitude.