NEW YORK, Dec. 23 (Xinhua) -- An earthquake of magnitude 6.5 jolted 82 km NNE of Nuku'alofa of Tonga at 23:08:41 GMT on Sunday, the U.S. Geological Survey said.

The epicenter, with a depth of 105.9 km, was initially determined to be at 20.456 degrees south latitude and 174.88 degrees west longitude.