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An earthquake has struck Colorado. The preliminary magnitude was 5.3, according to the U.S. Geological Survey. The earthquake was the largest to hit Colorado in almost 40 years, the Associate Press reported. Details from the USGS:

Date-Time:

August 23, 2011 at 05:46:19 UTC

August 22, 2011 at 11:46:19 PM at epicenter

Location: 37.070 N, 104.700 W

Depth: 4 km (2.5 miles)

Distances from epicenter:

15 km (9 miles) WSW of Trinidad, Colorado

33 km (20 miles) NW of Raton, New Mexico

54 km (33 miles) S of Walsenburg, Colorado

290 km (180 miles) S of DENVER, Colorado