Major 7.7-magnitude earthquake hits Chile

An earthquake with a preliminary magnitude of 7.7 struck 225 km (140 miles) southwest of Puerto Montt in southern Chile on Dec. 25, the United States Geological Survey has said. 

It was earlier reported as magnitude 7.6. 

The quake's depth was measured at about 15 km (nine miles). 

The U.S.-based Pacific Tsunami Warning Center issued a tsunami warning for areas within 1,000 km of the epicenter of the quake.