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

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

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

The USGS Earthquake Notification Service (ENS) has been providing fast, reliable alerts to thousands of people around the world for 20 years, allowing them to stay informed and prepared for ...

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 ...

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.S. Geological Survey said.

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

At least 21 moderate and smaller earthquakes hit San Ramon on Monday morning, jolting some residents awake.

A 4.2 earthquake, following a 3.8 quake rattled the San Francisco Bay area on Monday morning amid a string of over 30 temblors in the area, U.S. Geological Survey said.

Super Bowl week started off with quite the bang for those already in the championship’s host city. Multiple earthquakes, ...

The USGS recorded the strong quake.

A swarm of earthquakes shook the Bay Area on Monday, according to data from the U.S. Geological Survey.