Two earthquakes rocked California in back-to-back days as fears about two major fault lines have been “real and growing.” A magnitude 4.1 quake hit just outside of Frazier Park around 3:38 a.m. Sunday ...

There is no easy explanation for how the San Andreas fault, responsible for some of America's most powerful earthquakes, has ...

Back-to-back earthquakes rocked the area north of Los Angeles near two of California's most significant faults — including the mighty San Andreas — sending shockwaves across the region.

Los Angeles could see a major earthquake ...

Researchers modeled 1,000 years of earthquake history along Southern California's San Andreas and San Jacinto faults. What they found was troubling. Reading time 4 minutes No U.S. region is at greater ...

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.

What does that mean for earthquake risk?

The ground north and east of Los Angeles holds one of Southern California’s most uneasy meeting points. At Cajon Pass, the San Andreas and San Jacinto fault systems crowd together in a tectonic ...

Stress accumulating in the southern San Andreas fault. (Burkhard et. al., J. Geophys. Res. Solid Earth, 2026) It's called California's Big One for a reason. For more than a century, tectonic pressure ...

California isn’t exactly where it used to be. Here’s how earthquakes have gradually reshaped the state over time.

New research finds the San Andreas and San Jacinto faults in Southern California are more stressed now than at any time in 1,000 years, raising long-term earthquake risk for millions. Scientists ...

For decades, discussion about California's next major earthquake has tended to revolve around a single fault. The southern stretch of the San Andreas has long been viewed as the state's most closely ...