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

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating ...

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

More than 300 years ago, a massive earthquake rocked the Pacific Northwest. That event came from the Cascadia subduction zone ...

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

A 6.0 magnitude earthquake strikes off Oregon coast, triggering tsunami alert and concerns of aftershocks, as the Cascadia ...

Along the remote coast where the San Andreas Fault meets the Cascadia subduction zone, earthquakes too small for humans to ...

A 6.0 magnitude earthquake struck 183 miles off the Oregon Coast on Jan. 15.

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

Winter in the Pacific Northwest presents a picturesque landscape characterized by foggy mornings, snow-capped mountains, and resilient evergreen trees. However, beneath this beauty lies the formidable ...

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

CARNATION, Wash. — A magnitude 3.0 earthquake struck near Carnation Wednesday night, according to the U.S. Geological Survey. The quake struck just after 8:20 p.m. at a depth of 27.1 kilometers, the ...