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

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

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 ...

Thursday’s 3.1 magnitude earthquake was the latest of five notable aftershocks to hit Berkeley since a 4.3 magnitude ...

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

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 ...

A retired scientist with the USGS worries about the impact the government shutdown is having on the agency's earthquake ...

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 ...

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