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An earthquake has struck the Aleutian Islands. The preliminary magnitude was 6.1, according to the U.S. Geological Survey. A tsunami warning is not expected. Details from the USGS:

Date-Time:

September 14, 2011 at 18:10:07 UTC

September 14, 2011 at 09:10:07 AM at epicenter

Location: 53.138 N, 173.022 E

Depth: 1 km (~0.6 mile) (poorly constrained)

Distances from epicenter:

27 km (16 miles) NNW of Attu, Alaska

87 km (54 miles) WNW of Shemya Island, Alaska

3180 km (1975 miles) W of WHITEHORSE, Yukon Territory, Canada

3236 km (2010 miles) NE of TOKYO, Japan

This article will be updated if the event proves significant.