View Post TV Biz 6.0 Earthquake Strikes San Francisco Bay Area By Chris Ariens on Aug. 24, 2014 - 9:36 AM A preliminary 6.0 magnitude earthquake struck at 3:20amPT centered 6 miles southwest of Napa, north of the San Francisco Bay area. It’s the largest quake in about 25 years in the area. FNC’s Claudia Cowen, who lives in ...