Measure 4.0 earthquake strikes Fremont

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Tuesday, July 21, 2015
USGS map of Union City earthquake
A preliminary measure 4.0 earthquake struck at 2:41 a.m. on July 21, 2015, 2 miles east of Union City, Calif.

UNION CITY, Calif. -- A preliminary measure 4.0 earthquake struck at 2:41 a.m. 2 miles northeast of Fremont.

As of 3:10 a.m., there have been at least five aftershocks reported, the strongest being a measure 2.7.

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