A megasplay fault branches upward from the subduction zone, and in the event of "The Big One," would raise the seafloor, displacing a massive amount of water closer to the coast.

Sub-seafloor map of the Cascadia Subduction Zone, ... The 1700 megathrust earthquake is considered to be one of the largest in North America’s history, ...

A new study published in Science Advances has revealed the first detailed images of a newly developing subduction zone off ...

A so-called "doomsday tsunami" is likely to hit the United States in the near future, but scientists now say there is a ...

Off the coasts of southern British Columbia, Washington, Oregon and northern California lies a 600 mile-long strip where the Pacific Ocean floor is slowly diving eastward under North America. This ...

The Cascadia Subduction Zone, which is a 600-mile-wide fault system extending from Northern California to Vancouver Island, Canada, is the epicenter of a potentially disastrous seismic event. A ...

A tsunami warning has been issued for Alaska after a 7.2 magnitude tremor struck at a depth of 22 miles rocked the Pacific ...

Scientists are warning that a 1,000-foot-tall “mega tsunami” could potentially wipe a large chunk of America off the map – if a strong enough earthquake hits a specific active fault line ...

The Pacific Northwest is at risk for a mega-earthquake because of the Cascadia Subduction Zone. The region is primed for powerful quakes, with a particularly strong one called the Big One ...

The Cascadia Subduction Zone looks a little different than researchers thought. Here's what that means for "The Big One." ...