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 ...

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

The disaster caused by a predicted large earthquake in the Pacific Northwest could be compounded by shaking along the San Andreas fault in California, scientists warned.

A Cascadia subduction zone earthquake is coming for the Pacific Northwest, and when it hits, scientists now believe, it could ...

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

The San Andreas Fault runs nearly the entire length of California, a sliding boundary between tectonic plates. Its history is one of violent ruptures — earthquakes that have reshaped towns, destroyed ...

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

Scientists from Oregon State University studying sediment layers in the Pacific Ocean have discovered that two of the most ...

It's almost time for the "Great ShakeOut" and there's a new study telling us about the "Big One" ahead of the earthquake ...

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

A new study suggests that the 'Big One' earthquake on the West Coast of the United States could actually be two separate ...