Mt. Hood looms over Portland, Oregon.Credit: Barb Salam, Wikimedia Commons. "How much?" you say? Here's a short list: The Juan de Fuca plate is still subducting (sliding underneath) North America just ...

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 ...

We wrap up our tour of the Cascade volcanoes with a trip to the three southernmost members, including the biggest and maybe the weirdest. As the summer wraps up, it is also time to wrap up my tour of ...

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 ...

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 ...

Mount Rainier - one of many volcanoes found in the Cascade Range - is reflecting in the Reflection Lakes in Mount Rainier National Park in Washington State, USA. A seismic survey challenges the ...

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 ...

The United States, a volcanic hotspot, boasts 169 Holocene volcanoes, primarily in Alaska, Hawaii, and the Pacific Northwest. Hawaii's Volcanoes National Park, featuring Kilauea and Mauna Loa, ...