A strong undersea earthquake struck off eastern Indonesia late Friday, the U.S. Geological Survey said. There were no immediate reports of injuries, damage or a possible tsunami.

The magnitude 6.2 quake struck at 11:44 p.m. and was centered 34 miles beneath the Molucca Sea, the USGS said on its Web site.

Indonesia, the world's largest archipelago, 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.

A magnitude 9 earthquake and subsequent tsunami on Dec. 26 killed more than 131,000 people in Indonesia's western Aceh province and left a half-million homeless.

The USGS Web site mentioned no immediate possibility of a tsunami.