Magnitude 4.3 earthquake widely felt around San Francisco Bay Area

A magnitude 4.3 earthquake rattled the San Francisco Bay Area Tuesday afternoon, and residents around the region widely reported feeling light shaking.

The quake struck at 1:11 p.m. with a depth of 7.46 miles and an epicenter in the East Bay, about 7.5 miles east of Blackhawk and 17 miles southeast of Concord, according to the United States Geological Survey. A magnitude 3.5 aftershock followed at 1:28 p.m. in the same region.

The first earthquake was given a preliminary magnitude of 4.4, then downgraded to a 4.2 before the  USGS officially reported the temblor as a 4.3.

The USGS reports the 4.3 temblor occurred on the Greenville Fault. An earthquake of that magnitude could produce shaking around the epicenter but damage to structures is would not be expected.

Over the last seven days, there have been three other earthquakes above magnitude 3.0 within 100 miles of today’s event. A magnitude 3.5 quake struck near Morgan Hill, roughly 60 miles south of today’s tremors, on Monday at 1:46 p.m.

Check back for more reporting as this story develops.

Feel the quake? Send your reactions to SFGATE news producer Amy Graff at

Not sure if you’re prepared for the next major earthquake? Read The Chronicle Survival Guide for steps on how to get ready for it.

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