United States Geological Survey, Cascades Volcano Observatory
This page offers access to maps and graphics of earthquakes, active volcanoes and plate tectonics for the world, the Cascade Range , Juan de Fuca Ridge, Gorda Ridge and Axial Seamount in North America, South America, and Western Canada. The Ring of Fire is noted in some maps, and others offer data for the years 1994-1999.
This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you
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