A swarm of earthquakes under the largest volcano in the Cascade Mountain Range has some people wondering if it's rumbling ...

In the wake of the Mount St. Helens eruption, the US Geological Survey set up an lahar detection system at Mount Rainier in 1998, which since 2017 has been upgraded and expanded.

MOUNT RAINIER, Wash. — A swarm of small earthquakes was detected at Mount Rainier Tuesday morning, according to the U.S.

The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.

The snowcapped peak of Mount Rainier, which towers 14,411 feet (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.

In the shadow of Washington State’s Mount Rainier, about 90,000 people live in the path of a potential large lahar—a destructive, fluid and fast-moving debris flow associated with volcanic slopes.

Washington’s intense bout with record-breaking temperatures likely triggered a glacial mudslide on Mount Rainer. Monitors registered the lahar Tuesday afternoon, saying it lasted for hours ...

The activity began just before 1:30 a.m. on July 8, with hundreds of earthquakes recorded at depths ranging from over a mile ...

In the wake of the Mount St. Helens eruption, the US Geological Survey set up an lahar detection system at Mount Rainier in 1998, which since 2017 has been upgraded and expanded.

(CNN) — The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past ...