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An earthquake has struck off the coast of Oregon. The preliminary magnitude was 5.3, according to the U.S. Geological Survey. A tsunami warning has not been issued. Details from the USGS:

Date-Time:

October 13, 2011 at 04:13:59 UTC

October 12, 2011 at 08:13:59 PM at epicenter

Location: 43.440 N, 127.155 W

Depth: 10.3 km (6.4 miles)

Distances from epicenter:

233 km (144 miles) W of Coos Bay, Oregon

277 km (172 miles) WSW of Newport, Oregon

277 km (172 miles) NW of Brookings, Oregon

365 km (226 miles) WSW of SALEM, Oregon

This article will be updated if the event proves significant.