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Cascades Volcano Observatory

Find U.S. Volcano

The U.S. Geological Survey's Cascades Volcano Observatory strives to serve the national interest by helping people to live knowledgeably and safely with volcanoes in Washington, Oregon, and Idaho. 



USGS Offers Emergency Managers a New Tool to Assess Lahar Hazards at Mount Rainier


USGS Releases Five-year Nationwide Strategic Plan for Volcano Hazards


Volcanoes and USGS Volcano Science: Just the Facts