Earthquake Rattles The Bay Area

SAN FRANCISCO BAY AREA, CA — An earthquake with a preliminary magnitude reading of 3.4 was felt in the Bay Area at 7:44 a.m. Tuesday. The magnitude was downgraded to 3.0 in the afternoon.

The epicenter was in Alamo, according to the United States Geological Survey Shake Map. The Calaveras Fault runs through the area.

There have been no reports of injuries or damage.

Did you feel it? By 8 a.m., residents of the East Bay and North Bay reported feeling the shaking. By 8:30, San Francisco, the Peninsula and South Bay had also reported feeling it.

You may report what you felt to the USGS for tracking purposes. Report your response to USGS Did You Feel It.

The Berkeley Seismology Lab reports that the Calaveras Fault "roughly parallels Interstate 680, Alamo hosts a type of earthquake which is rather unique for the Bay Area. Over the decades several intense earthquake swarms occurred in this area."

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