Officials are tracking the largest swarm of earthquakes in more than 15 years on Washington's Mount Rainier but say there is ...

While considered an active volcano, Mount Rainier hasn’t erupted in at least a century, possibly much longer. The U.S ...

A "swarm" of earthquakes began at Mount Rainier in Washington in the early morning hours on Tuesday with hundreds of quakes detected so far, making it the largest such event at the volcano since 2009.

The last significant earthquake at Mount Rainier occurred in 2009, and rumbled on for three days. More than 1,000 seismic events were recorded with the most substantial registering a 2.3 magnitude.

Mount Rainier experienced its largest earthquake swarm since 2009 on Tuesday. USGS reported hundreds of small quakes under the surface near the stratovolcano's summit . The agency said there was ...

Hundreds of small earthquakes were detected at Mount Rainier on Tuesday in the largest such swarm at the active stratovolcano since 2009, according to the U.S. Geological Survey.

Scientists have recorded the "largest" earthquake swarm at Mount Rainier in Washington state since 2009, the U.S. Geological Survey reported.

Mt. Rainier will experience about nine quakes in a typical month. The last big quake swarm was in 2009 and measured over 1,000 quakes over three days, peaking at magnitude 2.3.

Now that that’s out of the way, the Cascades Volcano Observatory with the U.S. Geological Survey said Tuesday morning that a “swarm of earthquakes” had been detected at Mount Rainier ...

Historically, swarms of earthquakes at Mount Rainier occur one to two times per year, with the last significant swarm occurring in 2009. Over 1,000 earthquakes were reported during the 2009 swarm.