An earthquake 'swarm' comprised of hundreds of miniature earthquakes hit Mt. Rainier and the Cascade mountain in July.

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

Mount Rainier is an active stratovolcano 45 miles southeast of Tacoma and 60 miles south-southeast of Seattle. Its last ...

A tsunami warning has been issued for south Alaska and the Alaska Peninsula after a massive 7.3-magnitude earthquake, ...

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

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009 ...

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

SEATTLE (AP) — Officials are tracking the largest swarm of earthquakes in more than 15 years on Washington’s Mount Rainier ...

“Which way to the trashcano?” visitors asked scientists as they walked through the U.S. Geological Survey’s Cascades Volcano Observatory in east Vancouver. During Saturday’s open house, it ...

USGS-Cascades Volcano Observatory Technicians Kelly Swinford and Amberlee Darold (pictured in the snow pit) dug out the station on March 30, restoring data flow and improving our ability to ...

USGS’ Cascades Volcano Observatory in Vancouver continues, adapts its mission during pandemic. USGS’ Cascades Volcano Observatory in Vancouver continues, ...