A major earthquake hasn’t struck any of California’s biggest cities in more than three decades, but the “Big One” is a matter ...

Two fault lines on the west coast of North America—the Cascadia and San Andreas—appear to be seismically synchronized, with ...

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on ...

San Andreas, Cascadia faults could combine to produce back-to-back earthquake disasters, new research suggests – Nation and ...

Today is Friday, Oct. 17, the 290th day of 2025. There are 75 days left in the year. Today in history: In 1989, a magnitude-6.9 earthquake struck northern California, killing 63 people and causing up ...

SONOMA COUNTY, CA - Thursday evening, a preliminary 2.0 magnitude quake was recorded close to The Geysers, according to the U ...

SAN MATEO COUNTY, CA - A preliminary 2.5 magnitude quake was detected close to Woodside Thursday afternoon, according to the ...

A minor earthquake with a preliminary magnitude of 3.3 struck in Southern California on Thursday, according to the United ...

A 3.1-magnitude earthquake hit the San Francisco Bay Area of Northern California, the U.S. Geological Survey reported. The ...

New research offers the theory that the San Andreas fault and the Cascadia subduction zone could produce devastating back-to-back earthquake disasters.

Although Californians are relatively familiar with the San Andreas Fault, the Cascadia Subduction Zone is in many ways more ...