Preliminary 2.8 magnitude earthquake strikes near Castro Valley

A preliminary 2.8 magnitude earthquake struck near Castro Valley on Sunday morning, according to the United States Geological Survey. 

The quake, which struck at 11:04 a.m., was centered about 1.3 miles west-northwest of Castro Valley. 

Further information was not immediately available.

This is a developing story. Details may change as more information becomes available. Stay tuned for updates.

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