Data from the USGS shows the seismic events have ranged in strength from 2.5 up to 4.2 in magnitude.

19 Earthquakes Rock San Francisco Bay Area in 2 Hours on a Fault Feared to Trigger 'The Big One' ...

The biggest quake was a notable 4.2-magnitude shaker just after 7 a.m. amid an hour-long swarm that began with a ...

HUMBOLDT COUNTY, CA - A 4.7 magnitude quake was registered close to Petrolia Thursday morning, the U.S. Geological Survey ...

A series of earthquakes rocked a Bay Area city on Feb. 2. Did you feel it? San Ramon was hit by a cluster of quakes starting ...

A swarm of earthquakes rattled the San Francisco Bay Area early Monday morning, centered around San Ramon in California, ...

CONTRA COSTA COUNTY, CA - According to the U.S. Geological Survey, a 4.2 magnitude quake hit close to San Ramon Monday ...

Did you feel them? A 4.2 earthquake struck near San Ramon Monday morning amid a string of over 30 temblors in the area, the U ...

Seismologists Discover Hidden Faults Beneath One of the U.S.'s Biggest Earthquake Hotspots ...

A 4.9-magnitude earthquake and several aftershocks rattled the Inland Empire on Monday night, according to the United States Geological Survey.

A 4.9 earthquake near Indio Hills jolted Southern California, followed by four notable aftershocks that reinforced ...

Visiting California? Learn how common earthquakes really are, what experts say about "the Big One," and how you can stay prepared during your trip.