Unlike old soldiers, old volcanoes seemingly don't even fade away, much less die, with researchers discovering magma chambers under cones previously classed as dormant after thousands of years of ...

Long-quiet volcanoes in the Cascades region of the Pacific Northwest are still underpinned by large reservoirs of magma, new research finds. The findings have implications for monitoring volcanoes ...

It was the seventh volcano in four weeks for the French researcher and a team of volunteers from his hometown. In a scientific blitzkrieg through the Cascade Range, the 10 skilled mountaineers scaled ...

New Cornell University led-research challenges the long-standing belief that active volcanoes have large magma bodies that ...

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

A recent study has revealed that dormant volcanoes in the Cascade Range still contain significant amounts of magma beneath their surface, challenging long-standing assumptions about volcanic activity.

BEND, Ore. (AP) — A bulge near the prominent Cascade Range volcano known as South Sister has nearly stopped growing, scientists say. The uplift was spotted more than a decade ago and led scientists to ...

Mount Adams, about 70 miles north of Portland, is one of the sleepiest active volcanoes in the Cascade Range. A small earthquake every few years is typical. But it’s shaken up expectations recently — ...

Small earthquakes have rocked the active volcano Mt. Rainier in the Cascade Mountain Range this month, sending shockwaves around the 14,410-foot mountain. The United States Geological Survey reported ...

EUGENE, Ore. - Mount St. Helens caught science a little by surprise. A volcano hadn't erupted in the contiguous United States (U.S. excluding Alaska and Hawaii) since California's Lassen Peak in early ...

Of the United States’ 161 active volcanoes, 57 are under-monitored, according to the U.S. Geological Survey, creating blind spots that pose a huge potential threat to public safety. In 2009, ...