Cascades Volcano Observatory
Volcanoes have been erupting in the Cascade Range for over 500,000 years. During the past 4,000 years eruptions have occurred at an average rate of about 2 per century.
This chart shows 13 volcanoes on a map of Washington, Oregon, and northern California and time lines for each showing the ages of their eruptions.
Download this report as a 24" x 20" PDF file (gip63.pdf; 168 kB)
For questions about this report, contact Carolyn Driedger.
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