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An earthquake has struck off the coast of Chile. The preliminary magnitude was 5.5, according to the U.S. Geological Survey. A tsunami warning has not been issued. Details from the USGS:

Date-Time:

Friday, December 16, 2011 at 12:54:25 UTC

Friday, December 16, 2011 at 07:54:25 AM at epicenter

Location: 45.852°S, 76.264°W

Depth: 10 km (6.2 miles)

Distances from epicenter:

327 km (203 miles) W of Coihaique, Aisen, Chile

391 km (242 miles) SSW of Castro, Los Lagos, Chile

419 km (260 miles) W of Perito Moreno, Santa Cruz, Argentina

1457 km (905 miles) SSW of SANTIAGO, Region Metropolitana, Chile

This article will be updated if the event proves significant.