A light, 4.1-magnitude earthquake struck in Southern California on Sunday, according to the United ... may also prompt U.S.G.S. scientists to update the shake-severity map. An aftershock is usually a ...

Now a map released by the United ... San Bernadino is near a number of fault lines running through California that frequently cause earthquakes, including the Arrowhead fault, the Waterman Canyon ...

California is overdue for a major earthquake, experts say ... to drill new wastewater wells or rework existing ones near faults in Los Angeles, Santa Barbara, Kern and other counties (see map below).

Did you feel it? A 3.9 magnitude earthquake struck near Dublin Monday night, according to the U.S. Geological Survey.

and that’s “pretty standard for anywhere in California.” That’s because, in a single seismic event, individual faults can link up, resulting in an earthquake of a larger magnitude.