The Nisqually Glacier and the start of the Nisqually River are visible from a viewpoint along the Nisqually Vista Trail on Friday, June 6, 2025, at Mount Rainier National Park. The recent swarm of ...

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano since 2009. As of Thursday, July 10, 334 earthquakes had been identified at ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from James Genero IV, EarthScope ...

Scientists at the rim of the volcano smelled hydrogen sulfide, similar to rotten eggs, said Jeff Wynn, chief scientist for volcano hazards at the U.S. Geological Survey's Cascade Volcano Observatory.

“It’s now a larger swarm than anything we’ve seen since we’ve been (seismic) monitoring anything at Mount Rainier,” Alex Iezzi, a research geophysicist, said in an interview Thursday. Researchers ...

Researchers detected the largest Mount Rainier earthquake swarm on record. Over 400 small quakes have been located as of Friday and many more have been detected. The temblors have shown no evidence ...