The U.S. Geological Survey Cascades Volcano Observatory said the swarm began early Tuesday at the 14,410-foot volcano near ...

Geologists are continuing to monitor Mount Rainier in Washington state days after the first earthquake swarm in more than 15 ...

A magnitude 2.3 earthquake was recorded under Mount Rainier on Wednesday, the strongest yet in a swarm of over 229 quakes this week. USGS says there's no signs of impending eruption.

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano ...

The peaks of Mount Hood, Mount Adams, Mount St. Helens, and Mount Rainier are iconic and easily recognizable. But volcanic features are much closer to many of our backyards than we may realize.

Experts say it is only a matter of time until Mount Rainier, the most dangerous volcano in the US, unleashes itself upon tens of thousands living in the Pacific Northwest.

Mount Saint Helens, Mount Adams, Mount Baker, and Glacier Peak are four of the active volcanoes in Washington state. The fifth, located less than 70 miles from Seattle, is Mount Rainier.

There are more glamorous volcanoes to climb (Mount Rainier) or to ski (Mount Hood) or that have exploded in epically dramatic fashion in living memory (Mount St. Helens). Ask your climate questions.

At 12,277 feet (3,742 meters) high and 18 miles (29 kilometers) wide, Mount Adams is the largest active volcano in Washington, surpassing Mount Rainier — the state's highest peak — by volume.