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

SEATTLE — Newly-released research led by the University of Washington (UW) showed that a feature scientists hypothesized was present along the Cascadia Subduction Zone is missing in places. What does ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Workers check damage to Interstate 880 in Oakland after it collapsed during the Loma Prieta earthquake in October 1989. (Paul ...

(a) Geological units and earthquake distribution of an oceanic subduction zone. The orange shadow beneath the volcanic arc represents partially molten areas and magma channels. (b) Thermal structure ...

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

During an earthquake scenario with the highest level of subsidence, or land sink, the area at risk of flooding would expand by 116 square miles. Among the areas at risk after a megaquake along the ...

One of the most terrifying discoveries for the US population in general has just been made off the north coast of California. Scientists have found geological faults that had remai ...

Last week, about 60 miles off the coast near Ferndale, California, the tectonic plates shifted under the Pacific Ocean, sending seismic waves through the ocean floor that radiated onto land and were ...

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating earthquake risk at the Cascadia subduction zone.

The North American craton actually dips near the Rockies rather than forming a sharp vertical step as previously believed.