The USGS said the earthquake hit about 3.7 miles north of San Bernardino just after 4:05 p.m.
The ABC7 QuakeCam captured the moment the earthquake struck:
According to the USGS, the earthquake was at a depth of about 4.3 miles.
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Eyewitness News viewers reported feeling the earthquake in San Bernardino, Running Springs, Covina, Grand Terrace and Beaumont.