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An earthquake has struck the Revilla Gigedo Islands region. The preliminary magnitude was 6.5, according to the U.S. Geological Survey. A tsunami warning has not been issued. Details from the USGS:

Date-Time:

1 Nov 2011 12:32:00 UTC

1 Nov 2011 05:32:00 near epicenter

1 Nov 2011 07:32:00 EDT

Location: 19.889 N, 109.173 W

Depth: 5 km

Distances from epicenter:

227 km (141 miles) NE (56 degrees) of Socorro Island, Mexico

335 km (208 miles) SSE (167 degrees) of Cabo San Lucas, Baja Calif. Sur, Mexico

341 km (212 miles) SSE (167 degrees) of Cabo San Lucas, Baja California Sur, Mexico

417 km (259 miles) W (259 degrees) of Puerto Vallarta, Jalisco, Mexico

1033 km (642 miles) WNW (291 degrees) of Acapulco, Guerrero, Mexico

This article will be updated if the event proves significant.