Volcano Hazards Program

U.S. Geological Survey
General Information Product 75
Version 1.1

Cascades Volcano Observatory


By Dina Y. Venezky, Carolyn Driedger, and John Pallister

2008, revised 2009

face of postcard
Photograph by John Pallister

Washington’s Mount St. Helens volcano reawakens explosively on October 1, 2004, after 18 years of quiescence. Scientists at the U.S. Geological Survey’s Cascades Volcano Observatory (CVO) study and observe Mount St. Helens and other volcanoes of the Cascade Range in Washington, Oregon, and northern California that hold potential for future eruptions. CVO is one of five USGS Volcano Hazards Program observatories that monitor U.S. volcanoes for science and public safety. Learn more about Mount St. Helens and CVO at http://vulcan.wr.usgs.gov/.

Download the postcard (gip75.pdf; 216 kB)

For questions about the content of this report, contact Dina Venezky

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