Scientists say the San Andreas and San Jacinto faults are more stressed than at any time in 1,000 years, raising questions about future California quakes.

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 ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County at the Mendocino Triple Junction. It is where the San Andreas fault system ...

New research finds the San Andreas and San Jacinto fault systems are in a “critically loaded” state, with stress levels that ...

The West Coast of North America is a geologically tumultuous zone where tectonic plates collide, subducting under and scraping past one another. Over the eons, this activity has regularly caused major ...

The earthquake occurred 19 miles from Ridgecrest and about 33 miles north of Edwards Air Force Base, according to the U.S.

Earthquake experts have long warned of a looming "Big One" that will have devastating impacts. A study says warning signs ...

California is gradually shifting due to tectonic movement. Here's how impacts have impacted the state.

When people think about geological faults, they usually think about earthquakes. Yet faults do not move only during ...