Two magnitude 6.6 earthquakes struck Chile and Taiwan on October 31, but no deaths or damage were reported.

The quake off the Chilean coast was centered 56km southwest of Coquimbo at a depth of 11km, the US Geological Survey reported.

There were no reports of injuries or damage, though it swayed buildings in the capital Santiago. Mining operations in Chile, the world’s top copper producer, were unaffected.

Seismically-active Chile was battered in February 2010 by an 8.8 magnitude quake and ensuing tsunami, which caused billions in damage and killed hundreds.

The earthquake that struck Taiwan also shook high-rise buildings but there were no reports of casualties or major damage, residents and media said.

The quake struck the sparsely populated, mostly rural east coast of the island, 45km southwest of the town of Hua-lien, at a depth of 9.3km, the USGS said.

Taiwan lies along the so-called Ring of Fire around the Pacific and experiences regular earthquakes.

In September 1999, a 7.6 quake on the island killed about 2,400 people and destroyed or damaged numerous buildings.