Add The California Post on Google An earthquake struck in Contra Costa County early Saturday morning.
The 3.4-magnitude quake hit about 5.5 miles southwest of Brentwood around 12:30 a.m., according to the US Geological Survey.
An earthquake rocked the Bay Area. USGS Residents from as far away as Pleasanton and Pittsburg reported feeling the quake, KRON 4 reported.
