Down in California, the San Andreas Fault marks the boundary where the North American and Pacific plates are sliding past ...

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 ...

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

Although Californians are relatively familiar with the San Andreas Fault, the Cascadia Subduction Zone is in many ways more ...

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 ...

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

Residents of the US’s West Coast have long feared “The Big One” – the apparently inevitable massive earthquake that will one day hit where the Pacific tectonic plate meets its North American neighbor.

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

When the tectonic subduction zone beneath the Pacific Northwest moves, it does so in dramatic fashion. Not only is ground shaking from a magnitude 9+ earthquake incredibly destructive, the event ...