CONTRA COSTA COUNTY, CA - Monday afternoon, a 3.3 magnitude quake was recorded near Clayton, according to the U.S. Geological ...

CLAYTON – A magnitude 3.5 earthquake jolted Contra Costa County on Monday afternoon, according to the U.S. Geological Survey.

A 3.5 magnitude earthquake struck near Clayton, Contra Costa County, at 3 p.m. Monday, centered 4.8 miles east of the town, ...

CONTRA COSTA COUNTY, CA - A 3.2 magnitude quake was recorded near Bayview Sunday morning, according to the U.S. Geological Survey. A tremor rattled the area at 5:22 a.m. (4:22 a.m. local time).