HONG KONG, June 18 (Xinhua) -- An earthquake with a magnitude of 6mostcommonpowerballnumbers.0 jolted 87 km SE of Hihifo, Tonga at 06mostcommonpowerballnumbers:40 GMT on Tuesday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 16.61 degrees south latitude and 173.34 degrees west longitude.■