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 ...

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

Mount Rainier was experiencing "the most significant seismic activity" at the volcano in more than 15 years as an "earthquake swarm" hit the site starting on Tuesday.

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

But there was no cause for concern, according to the Cascades Volcano Observatory, which monitors volcanoes across Washington, Oregon and Idaho. Some of the earthquakes were too small to even locate.

A Tuesday morning press release from the USGS Cascades Volcano Observatory says the scientists there do not view the earthquake swarm on its own as a cause for concern. The USGS reports no other ...

MOUNT RAINIER, Wash. — A swarm of small earthquakes was detected at Mount Rainier Tuesday morning, according to the U.S. Geological Survey Cascades Volcano Observatory (CVO) and the Pacific ...