These fast-moving mudflows can devastate towns in a matter of minutes.

Volcanologists monitoring the Pacific Northwest have issued renewed warnings about several volcanic systems along the Cascade ...

Experts in volcanology observing the Pacific Northwest have raised fresh alerts regarding various volcanic systems within the ...

Social media videos are stoking fears about a catastrophic eruption in central Oregon, but the science tells a different story.

Add Yahoo as a preferred source to see more of our stories on Google. May 18 marks the 45th anniversary of the catastrophic eruption of Mount St. Helens in southwestern Washington. The blast in 1980 ...

It’s been 45 years since an eruption occurred on the U.S. mainland. The May 18, 1980, eruption of Mount St. Helens in southern Washington claimed 57 lives and blasted the terrain of old-growth spruce ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have recorded the "largest" earthquake swarm at Mount Rainier in Washington state since 2009, the U.S. Geological ...

Ex-Oregon Sen. Bob Packwood, who resigned amid sex assault probe, dies at 93 in hospice Former Republican Oregon Senator Bob Packwood, who resigned amid a sexual assault investigation, has died at 93.

Seeing a volcano with my own eyes is a total bucket list dream, but seeing a volcano that's experiencing active volcanic activity is an even crazier site. That's why Hawaii is moving up on my must-see ...

To the east of Mount Rainier are the remains of a once-mighty Cascade volcano. In the hills outside of Naches, Washington, at the foot of Mount Rainier are the remains of a much older volcano. Join ...

On May 22, 1925, Lassen Peak in California had its most powerful eruption in a series of eruptions that occurred in the Cascade Range between 1914 and 1917. That eruption, which occurred 111 years ago ...