A hidden shard of ancient crust has been detected where California’s San Andreas system collides with the Cascadia subduction zone, reshaping how I understand the tectonic engine of the West Coast.

A rapid-fire barrage of 16 earthquakes slammed Southern California in less than 24 hours, reigniting terrifying fears that ...

Along the remote coast where the San Andreas Fault meets the Cascadia subduction zone, earthquakes too small for humans to feel are sketching out a hidden map of danger. By tracking these tiny tremors ...

A 4.9-magnitude earthquake and several aftershocks rattled the Inland Empire on Monday night, according to the United States Geological Survey.

Southern California was shaken by an intense earthquake swarm as more than 150 seismic disturbances struck the Coachella ...

Over the last few days, the Coachella Valley has experienced more than 20 earthquakes, causing concern among some residents.

A small town in California was hit by earthquakes once every 22 years for over a century, setting the stage for a major seismic experiment in the 1980s and 90s. But the quake ended up being 11 years ...

A magnitude 5.2 earthquake ruptured in San Diego County on Monday — jolting Southern California and providing a reminder of the power of the Elsinore fault, which is capable of spawning even more ...