An earthquake with a preliminary magnitude of 5.2 hit Southern California on Monday morning. Experts with the Seismological ...

Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map. An aftershock is usually a smaller earthquake that follows a larger one ...

A magnitude 3.9 earthquake gave the San Francisco ... According to the USGS's epicenter map, shaking was felt as far north as the border of Solano and Yolo counties and as far south as Santa ...