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Preliminary Magnitude-3.5 Quake Strikes Near Rancho Cucamonga

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A preliminary magnitude-3.5 earthquake struck about 7 miles from Upland on May 23, 2016. (Credit: USGS)

A preliminary magnitude-3.5 earthquake struck Monday evening about 4 miles north-northwest of Rancho Cucamonga, according to the U.S. Geological Survey.

The quake struck at 7:28 p.m. at a depth of 6.2 miles, the USGS said.

The epicenter was 1 mile northeast of  San Antonio Heights, according to the USGS.