The Cascade volcanoes that dot the Pacific Northwest are not extinct. They are mostly dormant, meaning they could erupt sometime in the future. Scientists had long thought an indicator of an active ...

New Cornell University led-research challenges the long-standing belief that active volcanoes have large magma bodies that are expelled during eruptions and then dissipate over time as the volcanoes ...

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.

This month we'll take a tour of the Cascade Range volcanoes, all located along the western edge of North America. Some will be very familiar but others are hidden gems (and dangers) of the Pacific ...

The Oregon Cascade Range is ... complicated. From the surface it looks like the chain of volcanoes that we started exploring back in British Columbia remains the same. However, once you start looking ...

After Mount St. Helens erupted in 1980, experts were faced with a precarious question: How can we best prepare for when—not if—the next volcanic eruption in the Cascade Range occurs? Triggered by a ...

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 ...

About 13,000 years ago, Glacier Peak sent a lahar more than 60 miles down the Stillaguamish River valley, past where the town of Arlington, Washington now sits, and left behind more than 7 feet of ...

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 ...

Mount Lassen, in the southern Cascades, erupted on May 22, 1915, 65 years almost to the day before Mount St. Helens. Also known as Lassen Peak, the mountain is the southernmost active volcano in the ...