Major quakes in Japan and Alaska along with a spate of smaller earthquakes in California this fall make folks ask, is the Big ...

The clusters of earthquakes have all been underneath the East Bay suburb of San Ramon, which is close to the Calaveras fault.

The San Jacinto Fault, considered part of the San Andreas Fault system, has a 5% chance of magnitude 6.7 or larger earthquakes. The line begins at Cajun Pass and runs southeast through San Bernardino, ...

For centuries, the Cascadia Subduction Zone has lurked just offshore from Northern California to British Columbia, largely ...

The ShakeAlert system that warns about imminent shaking arriving from earthquakes sent a false alarm across California on ...