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

San Andreas, Cascadia faults could combine to produce back-to-back earthquake disasters, new research suggests – Nation and ...

The epicenter of the earthquake was along the San Andreas Fault, about 56 miles south of San Francisco and 10 miles north of ...

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

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

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 ...

Nearly a million San Diego County residents participated Thursday in this year's Great California ShakeOut, the statewide ...

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 big earthquake on the Hayward Fault could cause damage similar to deadly 1989 Loma Prieta quake, experts say. Thursday’s ...