HONG KONG, Aug. 5 (Xinhua) -- A 5.5-magnitude earthquake jolted 93 km south of Muara Siberut, Indonesia at 0856 GMT on Sunday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 2.4375 degrees south latitude and 99.3426 degrees east longitude.