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.

PORTLAND, Ore. (KOIN) – January 26 marked the 325th anniversary since the last earthquake struck the Cascadia Subduction Zone. Centuries later, the ancient quake has left clues for scientists to ...

A major earthquake could drastically change the geography of the Pacific Northwest and enhance the flood risk for those in the region. The new study, published in the journal Proceedings of the ...

Picture a fault line lurking just offshore, stretching the length of entire states and quietly storing energy. Scientists say the Cascadia Subduction Zone has been still for centuries, which makes the ...

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 ...

LOS ANGELES -- Could a monster earthquake sink a portion of Northern California? A new study calculates the risk of where and how much land could sink, but experts say there's something else closer to ...

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 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 ...