A third earthquake struck California in less than six hours, this one rocking the city of Hayward near San Francisco and San ...

A series of small earthquakes shook the San Francisco Bay Area on Thursday, according to the United States Geological Survey.

By contrast, an earthquake on the Puente Hills thrust fault system probably would max out at a magnitude 7.5 — still powerful, but less so than the southern San Andreas. The effects, however ...

MORGAN HILL, Calif. - A magnitude 3.4 earthquake struck east of Morgan Hill on Friday, the USGS reported. The earthquake was ...