An earthquake with a magnitude of 6.5 jolted south of the Fiji Islands at 04:31:42 GMT on Tuesday, Xinhua quoted the US Geological Survey as saying. The epicentre, at a depth of 602.3 km, was initially determined to be at 22.287 degrees south latitude and 179.541 degrees east longitude. There were no immediate reports of damage or casualties as a result of the tremor.