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Magnitude 3.1 earthquake shakes Concord

SF Gate logo SF Gate 1/22/2021 Amy Graff
map © USGS

A magnitude 3.1 quake rattled Concord on Thursday afternoon.

The United States Geological Survey detected the quake at 4:48 p.m. with an epicenter 0.7 miles from Concord, 2.4 miles from Pleasant Hill and 15 miles from Berkeley.

With a magnitude of 3.1 and depth of 9.32 miles, this quake could be felt near the epicenter but damage to structures is unlikely.

Many East Bay residents reported feeling a small shake in in social media.

The quake struck on the Concord-Green Valley Fault. "The Concord Fault maybe connected to the Greenville Fault through a complex set of faults under Mount Diablo, including the Mount Diablo Thrust," according to the USGS. The Concord Fault may also be connected to the northern Calaveras Fault through a complex set of faults south of Walnut Creek."

Over the last seven days, there have been three other earthquakes above magnitude 3.0 within 100 miles of this area.

On Jan. 14, a magnitude 3.8 earthquake struck in the same area.

Not sure if you're prepared for the next major earthquake? Read SFGATE's story on how to put together an earthquake survival kit and learn what USGS seismologists are doing to prepare for the big one.

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