After a record-breaking earthquake swarm near Mount Rainier, researchers around Mount Baker continue to plan and prepare for ...

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 ...

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 ...

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 ...

Scientists have begun a long overdue study of Glacier Peak in Snohomish County – the second most explosive volcano in the Cascades after Mount St. Helens – in what they hope will lead to badly needed ...

U.S. Geological Survey volcanologist Seth Burgess overlooks Clear Lake and Mount Konocti, the largest peak in the Clear Lake Volcanic Field — a quiet but high-threat volcanic system just 90 miles ...

Six low-intensity earthquakes rumbled beneath Mount Adams during September, according to the U.S. Geological Survey Cascades Volcano Observatory. That’s an unusual amount of seismic activity at the 12 ...

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 ...

Commercial pilots flying near Mount St. Helens reported a plume of fine ash rising over the volcano. USGS says it's a harmless phenomenon.