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

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

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 ...

An earthquake swarm began at Mount Rainier on Tuesday (July 8), with the region hit by more than 300 small quakes, the most significant seismicity at the volcano since 2009, the US Geological Survey ...

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." ...

The 1980 eruption cycle made Mount St. Helens one of the most famous volcanoes in the Cascades. But it is far from the only volcano in the range.

Adams lies 34 miles due east of Mount St. Helens. Although not as tall as Mount Rainier, it is larger in volume and the most massive composite cone in the Cascades.

The 45th anniversary of the catastrophic eruption of Mount St. Helens is on May 18. Here's what to know and when the volcano might erupt again.

A 3.7 magnitude earthquake struck south of Snoqualmie Pass, felt in Greenwater on Sunday morning. Learn more about the event.