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

The relationship between the sites means an earthquake in one zone can trigger an earthquake in the other in a phenomenon ...

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

OSU researchers find Cascadia Subduction Zone and San Andreas Fault may be synchronized — with the potential for quakes on ...

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

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

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

With the Great ShakeOut earthquake drill approaching, new research suggests a potential link between two major fault lines ...

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

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

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