Mount Rainier was experiencing "the most significant seismic activity" at the volcano in more than 15 years as an "earthquake ...

MT. RAINIER, Wash. — A swarm of small earthquakes was detected at Mount Rainier Tuesday morning, according to the U.S. Geological Survey Cascades Volcano Observatory (CVO) and the Pacific Northwest ...

"Going to be really impacted." Scientists issue warning after discovering worrying phenomenon on iconic US mountaintop: 'The trends were clear' first appeared on The Cool Down.