HONG KONG, July 27 (Xinhua) -- An earthquake with a magnitude of 5.5 jolted 32 km ESE of Neiafu, Tonga at 09:36:49 GMT on Wednesday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 18.7112 degrees south latitude and 173.6874 degrees west longitude.