Residents walk toward the designated safe area in a tsunami drill, in Samoa, California, in 2007. A silent colossus lurks off the Pacific coast, threatening hundreds of miles of coastline with ...

Deep beneath the Pacific Northwest, the Cascadia subduction zone poses the most significant seismic danger in the United States, according to the U.S. Geological Survey.

When an earthquake rips along the Cascadia Subduction Zone fault, much of the U.S. West Coast could shake violently for five minutes, and tsunami waves as tall as 100 feet could barrel toward shore.

Your phone blares, "Earthquake!" The voice instructs you to duck, cover, and hold on. About 30 seconds later, the shaking starts. At first, it makes the furniture sway. It's stronger than the little ...

When Washingtonians talk about the possibility of a major earthquake in the Cascadia Subduction Zone, the conversation typically focuses on the immediate impacts: the threat of casualties, building ...

Since January of 1700, pressure has been building beneath the waters of the Pacific. Off the coast of Oregon and Washington, several tectonic plates have been sliding under the plate beneath the North ...

SEATTLE — The threat of an earthquake at any given moment in Washington, Oregon, and Idaho is real. Right below our feet is the meeting place of multiple tectonic plates, slowly moving and pushing ...