Essentially, gas pistoning is a shallow, degassing-driven rise and fall of a lava surface. Often these pistons occur in ...

A small earthquake struck off the coast of Isla Vista on Thursday morning. It was 2.7 magnitudes, approximately 6 miles off the coast.

A late-night 2.9-magnitude earthquake shook the San Francisco Bay Area in California, the U.S. Geological Survey reported.

A 2.9-magnitude earthquake struck the East Bay on Monday night, according to the U.S. Geological Survey. The epicenter was 3.2 miles west of Dublin. The tremblor occurred at 11:55 p.m.

DUBLIN – A magnitude 3.0 earthquake jolted the East Bay late Monday night, according to the U.S. Geological Survey. The quake ...

An earthquake shook Merced County late Monday afternoon, according to the United States Geological Survey. The 3.6-magnitude ...

A 3.6-magnitude earthquake was reported in Merced County, California on Monday evening, with no damage reported.

A preliminary 3.0 magnitude earthquake struck near Dublin Monday night, according to the United States Geological Survey. The ...

A preliminary 3.6 magnitude earthquake struck near Los Banos, according to the United States Geological Survey.

While rare, Redding does get earthquakes strong enough for us to feel. Here's why Shasta and Siskiyou counties and the north ...

In California, where the next "Big One" is an always-looming threat, some lessons learned from the 1925 Santa Barbara quake ...