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

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 ...

The May 18, 1980, eruption of Mount St. Helens killed 57 people, according to the USGS. Most people died from asphyxiation or trauma from pyroclastic flows, a mix of rocks, ash, and gas, the USGS ...

— 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 Rainier may be one of the most iconic volcanoes in the U.S., but it's also considered the most dangerous. In this video, we dive into why Mount Rainier poses such a significant threat, from ...

Preparing to Climb Mt. Rainier Whether a first-time climber, or a seasoned veteran, preparation for this the Mt. Rainier journey begins now. The actual climbing ...

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.

Mount Adams in Washington state is seismically calm. But a flurry of earthquakes around the volcano has garnered attention from observers wondering whether it will blow.

"Some volcanoes, like St. Helens, Rainier, and Mount Hood undergo episodes of increased earthquake frequency where we see bursts of many earthquakes, which may last for days to weeks," he said.