USA Today — San Francisco residents got a jolt Saturday — and it wasn’t just from their morning coffee. A 3.5-magnitude earthquake shook the Bay Area, jangling nerves but not resulting in reports of damage or injuries.

The quake struck at 8:41 a.m. PST, centered 3.7 miles west-southwest of the Bay Area enclave of Colma, the U.S. Geographical Survey reported. But area residents taking to Twitter indicated it was felt from Sunnyvale, in California’s Silicon Valley, to Berkeley in the East Bay.

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