3.1 earthquake shakes Bay Area on Thursday night

An earthquake with a preliminary magnitude of 3.1 rattled an area southwest of Brentwood in Contra Costa County on Thursday night, according to the U.S. Geological Survey. An earthquake with a preliminary magnitude of 3.1 rattled an area southwest of Brentwood in Contra Costa County on Thursday night, according to the U.S. Geological Survey. The quake was reported about 9:29 p.m. near the Round Valley Regional Preserve off Marsh Creek Road. The quake struck along the Greenville Fault Zone, about 11 miles deep, the USGS said. No damage has been...