Magnitude 3.1 earthquake shakes Concord
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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.