The country's meteorology and seismology agency warned that with a preliminary magnitude of 7.2 it was strong enough to cause a tsunami. There were no immediate reports of giant waves. It struck at 2:43 p.m. EST, around 85 miles off of Manokwari, Irian Jaya, at a depth of about 6 miles.

Hasim Rumatiga, a local health official, said electricity went off and residents ran to higher ground. Indonesia straddles a chain of faultlines and volcanoes known as the Pacific "Ring of Fire" and is prone to seismic activity. A huge quake off western Indonesia caused the 2005 Asian tsunami that killed around 230,000 people.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2009bjbn.html