An earthquake with a preliminary magnitude of 2.1 struck an area near Hayward Sunday afternoon, the U.S. Geological Survey is reporting.
The quake was reported at 2:37 p.m. about 1 mile southeast of Hayward and about 3 miles south-southeast of Castro Valley, according to the USGS.
The temblor had a depth of 2.7 miles, according to the USGS.
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