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Large lahars (volcanic mudflows) from eruptions and from collapses of this massive, heavily glaciated andesitic volcano have reached as far as the Puget Sound lowlands. Since the last ice age, several dozen explosive eruptions spread tephra (ash, pumice) across parts of Washington.
- News
At around 14,410-feet Mount Rainier, a snowcapped volcano in...
- Monitoring Lahars at Mount Rainier
Geologists have found evidence for at least nine large...
- Multimedia
Jon Major, scientist-in-charge of the USGS Cascades Volcano...
- Hazards
This map shows areas that could be affected by debris flows,...
- Future Eruptions at Mount Rainier
New eruptions of Mount Rainier will most likely start with...
- News
4 Νοε 2023 · New eruptions of Mount Rainier will most likely start with steam and ash explosions at the summit, and progress to the effusion of a small lava flow or the disintigration of steeply sloping lava flows as avalanches of hot rock and gas called a pyroclastic flow.
8 Νοε 2023 · This map shows areas that could be affected by debris flows, lahars, lava flows, and pyroclastic flows from Mount Rainier if events similar in size to past events occurred today. Because small lahars are more common than large ones, most lahars would be less extensive than the hazard zone shown on the map and a few would be more extensive.
Green = normal activity / dormant. Yellow = unrest: some signs of unrest, but no eruption in near future (days to weeks) likely. Orange = Minor activity / eruption warning: infrequent small eruptions or strong signs that suggest an eruption could be imminent (days or few weeks)
31 Αυγ 2023 · Webmap depicting potential volcanic risk for Mount Rainier. Web Map by EsriTrainingSvc
Majestic Mount Rainier soars almost 3 miles (14,410 feet) above sea level and looms over the expanding suburbs of Seattle and Tacoma, Washington. Each year almost two million visitors come to Mount Rainier National Park to admire the volcano and its glaciers, alpine meadows, and forested ridges. However, the volcano's beauty is deceptive.
27 Σεπ 2018 · Mount Rainier National Park aids with logistical support as the USGS Cascades Volcano Observatory (CVO) conducts monitoring of seismic activity (with the Pacific Northwest Seismic Network), ground deformation, hydrothermal activity, and more to track Mount Rainier’s volcanic activity.
