Mount Rainier has produced major lahars every 500 to 1,000 years and smaller flows more frequently. The most recent major lahar to reach the Puget lowlands was the Electron Mudflow about 600 years ...

A debris flow that moved down Tahoma Creek at Mount Rainier National Park has temporarily closed the park’s Westside Road. The flow, which carried mud, sediment, and rocks downstream, happened ...

Several of Mount Rainier’s glaciers are already gone, experts say, and others aren’t far behind. The News Tribune asked what ...

A slurry of rocks and mud sounded like a freight train when it ripped through a popular Mount Rainier hiking destination in 2001 and scared some television viewers who believed their homes were in ...

Mt. Rainier National Park rangers closed the highway to Paradise, the park’s main visitor center, for several hours after a small flow of mud and debris dislodged some trees and rocks.

A fresh flow of mud and rocks poured down a Mount Rainier stream Thursday as melting glacier water stripped debris from the peak's flank. Sodden debris began to break loose Tuesday evening ...

LONGMIRE — Melting glacier water continued to strip debris from a flank of Mount Rainier on Wednesday, sending car-sized boulders downstream and prompting rangers to close a popular trail. A series of ...

What lies beneath: Eruption path for 10-mile deep reservoir of magma deep below Mount Rainier is mapped out to try to predict flow of lava before volcano burst back to life ...

ORTING, Wash. - New technology is coming to Pierce County to warn people of a possible Mt. Rainier eruption or giant mudflows, known as lahars. There's been no recent seismic activity from Mt ...

USGS scientist Carolyn Driedger, right, and Mount Rainier National Park ranger Scott Beason frame the terminus of the Nisqually Glacier during a training session for seasonal rangers at the park ...