A U.S. Geological Survey map indicates the epicenter of a 3.9 earthquake measured in San Bernardino National Forest on Wednesday, Dec. 28, 2016.
A U.S. Geological Survey map indicates the epicenter of a 3.9 earthquake measured in San Bernardino National Forest on Wednesday, Dec. 28, 2016. USGS
A U.S. Geological Survey map indicates the epicenter of a 3.9 earthquake measured in San Bernardino National Forest on Wednesday, Dec. 28, 2016. USGS

3.9 earthquake detected in San Bernardino National Forest

December 28, 2016 11:02 AM

UPDATED December 28, 2016 05:50 PM

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