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

A 1,000-foot mega-tsunami could strike the U.S. West Coast — and experts say it’s not a matter of if, but when. A new study ...

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

Researchers named the spring "Pythia’s Oasis" for Ancient Greece's Pythia, an oracle who sat in a temple above a crack in the ...

A subduction zone near Cascadia is unraveling piece by piece. The process offers a rare glimpse into how tectonic plates die ...

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

In some parts of Earth's interior, seismic waves travel at different speeds depending on the direction in which they are ...

Geosphere, demonstrating the first evidence that the two faults have interacted repeatedly over thousands of years. The ...

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 ...

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

My regular readers are going to need some context and backstory to what motivated writing this series of posts. It's a three-part series -- here is Part 2 and Part 3. I recently had an exchange with ...