A megaquake in the Pacific Northwest could trigger a large earthquake along California's San Andreas Fault, creating an unprecedented catastrophe up and down the Pacific Coast, a new study has found.

A strip of restless ocean off the Pacific Northwest conceals a threat that has been building for centuries. Beneath these waters lies the Cascadia Subduction Zone—a 600-mile fault line locked since ...

Here’s what you’ll learn when you read this story: Researchers hoping to unravel the dance of earthquake movement in North America’s West Coast discovered a disturbing fact: Two of the world’s largest ...

Scientists recently announced a terrifying find: A megaquake on the fearsome Cascadia fault in the Pacific Northwest could trigger a huge tremor on the San Andreas fault - essentially back-to-back ...

The Carrizo Plain in eastern San Luis Obispo County contains the most strikingly graphic portion of the San Andreas Fault. Sediment cores recovered from the Pacific seafloor suggest that megathrust ...

CORVALLIS, Ore. – Two fault systems on North America’s West Coast – the Cascadia subduction zone and the San Andreas fault – may be synchronized, with earthquakes on one fault potentially triggering ...

The West Coast is years overdue for the next big earthquake. When the colossal tremor eventually strikes, seismologists expect high-rises and other buildings to collapse, massive fires that can burn ...

Add Yahoo as a preferred source to see more of our stories on Google. Map showing the Cascadia subduction zone and the San Andreas Fault. (USGS/Illustration by SFGATE) Two of the West Coast's most ...

The so-called “Big One” or Cascadia Subduction Zone earthquake expected to trigger disruptive quakes throughout the West Coast could cause more damage than previously estimated if it sets off quakes ...

Geological records hint that earthquakes at the Cascadia subduction zone might trigger the San Andreas Fault. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

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 ...