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

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

While considered an active volcano, Mount Rainier hasn’t erupted in at least a century, possibly much longer. The U.S ...

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

Earthquake swarm strikes Mt Rainier in Washington state Mount Rainier is Washington’s highest peak and is visible from 60 miles away in Seattle on clear days Graig Graziosi in Washington, D.C.

The hundreds of Mount Rainier earthquakes detected Tuesday marked the largest seismic swarm at the active stratovolcano since 2009, the USGS said.

Hundreds of earthquakes have been detected near Mount Rainier on Tuesday, the largest such swarm since 2009.

Earthquakes are common at Mount Rainier, happening about nine times every month, the agency said. Swarms of earthquakes happen once or twice per year.

Mount Rainier, the active volcano towering above southwestern Washington state, started rumbling — very lightly — on Tuesday. A swarm of small earthquakes was detected under the mountain ...