The U.S. geological agency says a powerful earthquake has struck off East Timor's coast, but there have been no reports of injuries or damage.

The U.S. Geological Survey says Saturday's quake had a preliminary magnitude of 6.2 and struck 100 miles northwest of the capital, Dili. It was centered 250 miles beneath the Banda Sea.

The power of the quake sent residents fleeing from their homes, some carrying crying children.

East Timor is prone to seismic upheaval due to its location on the so-called Pacific "Ring of Fire," an arc of volcanos and fault lines encircling the Pacific Basin.