A preliminary 3.1 magnitude quake was reported near Petrolia Saturday morning, according to the U.S. Geological Survey.

A 3.6-magnitude earthquake struck near Vallejo, California, on Thursday afternoon, with tremors felt across Berkeley, Benicia ...

OPINION: California's earthquake preparedness achievements were born from disaster. It now needs to do the same to counter ...

A 3.2-magnitude earthquake struck Northern California, just near Sonoma County, early Friday morning, according to the U.S. Geological Survey.

The Sacramento Bee reported that at least 20 earthquakes, ranging from Mill Valley to Half Moon Bay were reported Sunday ...

A series of earthquakes between 2.5 and 3.8 magnitude struck southeast San Ramon beginning at 9:38 a.m. Sunday, according to the U.S. Geological Survey. The first quake, magnitude 3.8, rattled the ...

When will "The Big One" hit the U.S. West Coast? Nobody knows, but should it happen, science can give us a good idea of its ...

SONOMA COUNTY, CA - Friday morning, a 3.1 magnitude quake was recorded near The Geysers, according to the U.S. Geological Survey. It was reported that a tremor shook the region at 4:23 a.m. The ...