Mount Rainier (Figure 2.1) is one of about two dozen recently active volcanoes in the Cascade Range, a volcanic arc formed by subduction of the Juan de Fuca plate beneath the North American plate.

“In the Cascades, broadly, we’re located along a subduction zone,” explained United States Geological Survey (USGS) Research Geologist Emily Johnson. “So that's where there's an oceanic plate that's ...

Our western volcanoes : an overview -- Plates in motion : the ring of fire, hot spots, and supereruptions -- Magma and mountains : how volcanoes erupt and the landforms they build -- Glaciers on ...

New research offers clues as to why Mount St. Helens is one of the most explosive volcanoes in the Cascade range and why it stands apart from the chain of other Cascade volcanoes. Scientists from the ...

To the east of Mount Rainier are the remains of a once-mighty Cascade volcano. In the hills outside of Naches, Washington, at the foot of Mount Rainier are the remains of a much older volcano. Join ...

Social media videos are stoking fears about a catastrophic eruption in central Oregon, but the science tells a different story.

A hidden reservoir of groundwater more than twice the size of Lake Mead is buried inside the Oregon Cascades, a new study reports. Scientists found that the underground aquifer holds at least 19.4 ...

The 1980 eruption cycle made Mount St. Helens one of the most famous and now best-monitored volcanoes in the Cascades. But it is far from the only volcano in the range. From southern British Columbia ...

The previous chapters reviewed the hazards to property and life from Mount Rainier and outlined research needed to provide for better understanding of their nature and frequency of occurrence. This ...