SANTIAGO, Chile — A powerful earthquake shook southern Chile on Sunday, prompting officials to order an evacuation of coastal areas to guard against a possible tsunami.

The U.S. Geological Survey put the quake's magnitude at 7.6 and said it struck at 11:22 a.m. local time near the southern tip of Chiloe Island, about 25 miles south-southwest of Puerto Quello and at a depth of 22 miles. The area, some 800 miles south of the capital of Santiago, is relatively sparsely populated.

A damaged road is seen after a quake at Tarahuin, on Chiloe island, southern Chile on Dec. 25. Alvaro Vidal / Reuters

Chile's naval oceanographic service declared a preventative tsunami alert and officials began evacuating coastal areas in the southern part of the country.

The regional director for the national emergency service, Alejandro Verges, told TVN television that there were no immediate reports about damage, though he said that "there should be some damage" due to the power of the quake. He said communication was difficult in the region.

Taxi driver Luis Ramirez told The Associated Press by telephone from the town of Ancud that he was washing his car when the quake hit. "I'm 48 years old and I've never felt anything so strong," he said.

Ramirez said cars equipped with loudspeakers were roaming the streets urging people to evacuate beach areas.

A much stronger magnitude 8.8 earthquake in February 2010 generated a tsunami and killed 524 people in Chile.