HONG KONG, Dec. 5 (Xinhua) -- An earthquake with a magnitude of 5.5 jolted Tonga region at 06:43:20 GMT on Saturday, the U.S. Geological Survey said.

Photo: screenshot of USGS website

The epicenter, with a depth of 10.0 km, was initially determined to be at 18.8708 degrees south latitude and 172.8042 degrees west longitude.