Large subduction-zone earthquakes leave scars on the continental slope in the deep sea.

Imagine a scenario where the Pacific Northwest gets pummeled by a magnitude nine earthquake, only to have California's most ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County ...

Scientists are uncovering a hidden and surprisingly complex earthquake zone beneath Northern California by tracking swarms of ...

By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San ...

Seismic tremors reveal a shallow fragment of ancient tectonic plate beneath Northern California, helping explain damaging ...

Add Yahoo as a preferred source to see more of our stories on Google. PORTLAND, Ore. (KOIN) – A new study mapping the Cascadia Subduction Zone is giving scientists clues about the state of the fault ...

Tremors beneath Northern California show hidden plate movement, helping scientists better understand where future big ...

A recent voyage got up close and personal with an underwater fault that could reshape life in the Pacific Northwest. Anne Trehu, a Professor Emeritus who worked at Oregon State University says "There ...