HONG KONG, June 15 (Xinhua) -- An earthquake of 5.6 magnitude jolted 100km NE of Hihifo, Tonga at 13:18:53 GMT on Friday, the U.S. Geological Survey (USGS) said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 15.3967 degrees south latitude and 173.0035 degrees west longitude.?