Non-volcanic tremor ramp up precedes slow slip in Cascadia by about a day, indicating that brittle-creeping process ...

Bowen cashed in on the boom. He built a nine-story tower in the Pearl District and sold it for $87.5 million, setting a city ...

Not all mountains in the Yellowstone region are volcanic in origin. The Wind River Range, southeast of Yellowstone National ...

By Brian Brown, president and partner at food marketing agency Ingredient  For those living on the West Coast of North ...

A flurry of earthquakes in the Seattle area over the last couple of weeks has some residents asking if that means the "Big ...

Washington hasn’t seen a major earthquake since the 6.8 magnitude Nisqually earthquake in 2001. The Cascadia Subduction Zone, ...

The 3.9 magnitude earthquake hit at 4:18 p.m. on the Olympic Peninsula, according to the United States Geological Survey.

Subduction zone earthquakes: This earthquake results from the tension of an oceanic plate slipping beneath a continental ...

Monday’s early morning earthquake rattled a few nerves and had many Islanders thinking about the 'great' rattlers that have come and gone, as well as the 'big ones' looming ...

Surprising differences in the two so-called Large Low-Velocity Provinces may risk instability in Earth's protective magnetic ...

This earthquake is larger than much of the recent seismic activity around western Washington, per initial reports.

The last big, “megathrust” earthquake in the region, along the 600-mile-long Cascadia Subduction Zone, was in 1700. Experts say the likelihood in the next 50 years of a “megathrust” on the ...