Record stress is building on Southern California's San Andreas and San Jacinto faults, raising the risk that both could ...

A 5.6 magnitude earthquake rattled parts of Northern California early Wednesday, according to the United States Geological ...

Earthquake experts have long warned of a looming "Big One" that will have devastating impacts. A study says warning signs continue to grow in 2026.

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

Southern California is home to two major fault lines, the San Andreas and San Jacinto, where large tectonic plates grind past each other, occasionally triggering violent earthquakes. While smaller ...