SONOMA COUNTY, CA - A preliminary 2.5 magnitude quake was reported close to Glen Ellen Sunday afternoon, according to the U.S ...

CONTRA COSTA COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.2 magnitude quake occurred close to San ...

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

California has no shortage of geological marvels, many tucked within one of the state's national parks. But to view a ...

Geologist Kirt Kempter tells the 300-million-year story of the Abiquiú area while exploring the boundary between the Rio ...

A magnitude 4.0 earthquake Sunday afternoon three miles from Santa Rosa was followed a few minutes later by magnitude 3.1 and ...

Sonoma County was hit by three earthquakes within a little more than half an hour Sunday, the largest one having a ...

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

The Florida Museum of Natural History recently published “The Butterflies of California,” an online book that contains a ...

It didn’t relent until hundreds of miles of the Central Valley turned into an inland sea, leaving the city of Sacramento ...

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, ...

A series of earthquakes rattled California’s Bay Area near Gilroy on Wednesday, according to the U.S. Geological Survey. The largest was a magnitude 4.0 quake centered about 8 kilometers east of ...