SONOMA COUNTY, CA - A 4.2 magnitude quake occurred close to The Geysers on Thursday morning, according to the U.S. Geological Survey.

A swarm of earthquakes has hit the Imperial Valley city of Brawley, the most significant ranging in magnitude from 2 to 4.7 — with scores more registering at lower magnitudes. In all, the U.S. Geological Survey has reported some 355 quakes over the past day. At least 40 quakes strong enough to make the 2.0 and higher magnitude list are among those.

A 3.4-magnitude earthquake struck roughly 4 miles southwest of Redlands near the border of Riverside and San Bernardino counties Friday evening. The earthquake is the third sizable quake to hit

DEL NORTE COUNTY, CA - A 4.8 magnitude quake occurred close to Crescent City on Friday evening, according to the U.S. Geological Survey.

IMPERIAL COUNTY, CA - A 4.4 magnitude quake rattled close to Brawley on Saturday evening, according to the U.S. Geological Survey.

San Diego County was lightly shaken late Saturday and early Sunday by a series of small, connected earthquakes that originated in the Brawley area of Imperial County, according to the U.S. Geological Survey.

It’s every Californians worst nightmare. Now experts are warning “The Big One” could be even worse than feared due to a horrific domino effect that could wipe out the West Coast. ScienceDaily this week highlighted a concerning study from Oregon State University showing a seismic event on the Cascadia subduction zone could trigger the San Andreas fault line.

HUMBOLDT COUNTY, CA - A 3.6 magnitude quake jolted near Petrolia on Monday morning, according to the U.S. Geological Survey. The tremor, which shook the area at 3:41 a.m. (2:41 a.m. local time), was centered roughly 32 miles west of Petrolia. It occurred ...

A flurry of seismic activity recently has struck Nevada, including a magnitude 5.7 earthquake 45 miles east of Reno that was powerful enough to cause moderate-to-strong shaking in the small town of Silver Springs.