SONOMA COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.9 magnitude quake rattled near The Geysers ...

HUMBOLDT COUNTY, CA - A 2.6 magnitude quake was detected close to Petrolia Sunday night, the U.S. Geological Survey reported.

A swarm of at least six earthquakes reaching up to magnitude 2.9 rattled San Ramon near San Francisco, the U.S. Geological ...

The quake came only eight days after three earthquakes shook the area in the course of about 100 minutes. More than 30 quakes ...

On Monday morning, around 30 minor earthquakes erupted in a swarm near the Geysers geothermal field south of Clear Lake. The day before, seven quakes rattled Sonoma County, including a 4.0 quake. The ...

California's seismic risk is increasing with supershear earthquakes, which are faster and more destructive than typical ...

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, ...

The federal government and earthquake experts blamed a technical glitch for the alert that sent warnings hundreds of miles ...

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

A rare, ultra-long earthquake in Myanmar revealed that mature faults can deliver their full force directly to the surface.

Aftershocks have been recorded for both earthquakes. On Dec. 8, Japanese authorities warned an even more powerful earthquake ...