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 ...

In the preceding week, small earthquakes were detected at Mount Rainier and Mount St. Helens, but the activity was "consistent with background activity levels in the Cascade Range." ...

[It} actually has quite a few deep earthquakes that look like magma is either coming into the system or is cooling under there,” Thelen explained. “Now, go to Mount Rainier.

Although not as tall as Mount Rainier, it is larger in volume and the most massive composite cone in the Cascades. It last erupted over 1,000 years ago, and the current cone was built 40,000 to ...

— A 3.7 magnitude earthquake was reported near the town of Greenwater, south of Snoqualmie Pass, on Sunday morning. The quake happened at around 8:15 a.m. and may have been felt from Mt. Rainier ...

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.