Earthquake strikes San Francisco Bay Area Aug17 by Joseph Saraceno A magnitude 4.0 earthquake was reported Monday morning in Piedmont, Calif., near Oakland, according to the U.S. Geological Survey. The temblor occurred at 6:49 a.m. Pacific time at a depth of 3.1 miles. MORE Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related