A snowcapped backdrop to Seattle and Puget Sound, Mount Rainier is a slumbering giant that last erupted in the 1890s.

When was the last time Mount Rainier erupted? Mount Rainier hasn't had a major eruption, with strong geologic evidence, in the past 1,000 years, Weiss-Racine said.

Szeliga can see Mount Rainier every day from where he teaches at Central Washington University in Ellensburg. When the swarm hit, he began studying incoming GPS data to look for permanent changes in ...

Mount Rainier eruption risk In addition to the risk posed by the earthquakes themselves, Mount Rainier is an active volcano and seismic activity can be related to a potential eruption.

Over 300 earthquakes detected under Mount Rainier in July. Learn about safety, eruption risk, and whether it’s safe to visit the active volcano this summer.

A swarm of more than 1,350 earthquakes shook Mount Rainier this summer. USGS scientists took a closer look. Here’s what they ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009, the USGS said.

Researchers continued to caution the public about the quakes, which do not necessarily presage an eruption.

A swarm of more than 300 earthquakes has now been recorded at Mount Rainier.

Over 300 earthquakes detected under Mount Rainier in July. Learn about safety, eruption risk, and whether it’s safe to visit the active volcano this summer.