These are two very different fault systems, but the sediment record suggests that in the past, at least three San Andreas ...

The West Coast of North America is a geologically tumultuous zone where tectonic plates collide, subducting under and ...

New research offers the theory that the San Andreas fault and the Cascadia subduction zone could produce devastating ...

The annual Great California ShakeOut saw over 10 million residents across the state practise earthquake safety drills, ...

A mega-earthquake might be triggered by two volatile faults, striking in unison, with one quake nudging the other into ...

Samples from the seafloor reveal evidence of several earthquakes along the West Coast’s two major fault zones happening in ...

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

A total of 980,458 participants were registered in San Diego to stop everything for a minute to "drop, cover and hold on" at ...

Supershear earthquakes are more common than previously believed, some scientists say — carrying potentially profound risk for ...

The one-minute drill was developed to teach people what to do when a large temblor strikes. If you have the MyShake app, your ...

Scientists at Oregon State University say there's new evidence that two of the best-known earthquake fault lines on the West ...