The U.S. Geological Survey said the 6.5-magnitude quake struck at 1:08 a.m. (1708 GMT Thursday) and was centered 315 miles (510 kilometers) beneath the ocean floor. It hit waters 160 miles (260 kilometers) northeast of Bali.

Beni Hendrawanto, of the country's geological and meteorology department, said it could be felt in the main city of Denpasar but there were no initial reports of damage or injuries.

Indonesia is located on the Pacific "Ring of Fire," an arc of volcanos and fault lines encircling the Pacific Basin.