BEIJING, May 4 (Xinhua) -- An earthquake with a magnitude of 5.0 jolted 190 km west of Neiafu, Tonga at 1636 GMT on Sunday, the U.S. Geological Survey said.

The epicenter, with a depth of 292.3 km, was initially determined to be at 18.54 degrees south latitude and 175.78 degrees west longitude.