The Cascadia Subduction Zone is unusually quiet for a megathrust fault. Spanning more than 600 miles from Canada to ...

The Cascadia Subduction Zone is unusually quiet for a megathrust fault. Spanning more than 600 miles from Canada to California, the fault marks the ...

Add Yahoo as a preferred source to see more of our stories on Google. New research reveals the Cascadia and San Andreas faults may be linked, with quakes on one triggering the other. (CREDIT: ...

Add Yahoo as a preferred source to see more of our stories on Google. Tiny quakes help scientists map hidden faults where the San Andreas meets Cascadia, reshaping quake hazard estimates. (CREDIT: ...

Workers check damage to Interstate 880 in Oakland after it collapsed during the Loma Prieta earthquake in October 1989. (Paul Sakuma / Associated Press) They are two of the West Coast's most ...

SAN FRANCISCO -- Scientists say there's new evidence that two of the best-known earthquake fault lines on the West Coast are in sync and that has the potential for a major disaster. A new study by ...

A 9.2 megathrust earthquake on the Cascadia Subduction Zone would not just rattle the Pacific Northwest, it would redraw the map of the region and test the limits of modern disaster planning.

The pressure keeps building below the Earth’s surface off the coast of the Pacific Northwest, and a multi-layered disaster could strike at any time. A huge earthquake is brewing along the Cascadia ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County at the Mendocino Triple Junction. It is where the San Andreas fault system ...