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 ...

Julia Shumway / Oregon Capital Chronicle The so-called “Big One” or Cascadia Subduction Zone earthquake expected to trigger disruptive quakes throughout the West Coast could cause more damage than ...

For generations, scientists believed that the West Coast’s two great earthquake engines — the Cascadia subduction zone and the San Andreas fault — operated on separate geologic stages. One dives, one ...

Most people picture earthquakes as a West Coast problem. California shakes regularly, the news covers it, and residents there have grown accustomed to a certain background level of geological anxiety.

PORTLAND, Ore. (KOIN) – The Cascadia Subduction Zone is “unusually quiet,” for a megathrust fault, making it more difficult for scientists to understand its behavior and structure. With help from ...

They are two of the West Coast’s most destructive generators of huge earthquakes: The San Andreas fault in California and the Cascadia subduction zone offshore of California’s North Coast, Oregon, ...

This is read by an automated voice. Please report any issues or inconsistencies here. New research suggests the San Andreas fault and the Cascadia subduction zone could produce devastating ...

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 ...

The threat of a 9.0-magnitude earthquake along the Cascadia Subduction Zone has hung over the Pacific Northwest for decades. Seismologists and emergency managers say “The Big One” could be one of the ...

PORTLAND, Ore. (KOIN) – Oregon Governor Tina Kotek signed an executive order on Monday aiming to help the state prepare for earthquakes. Executive Order 25-22 directs Oregon’s Department of ...