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Fact Sheet 2013–3014, version 1.1

U.S. GEOLOGICAL SURVEY and the U.S. FOREST SERVICE—OUR VOLCANIC PUBLIC LANDS

Mount St. Helens, 1980 to Now—What’s Going On?

By Daniel Dzurisin, Carolyn L. Driedger, and Lisa M. Faust

Thumbnail of and link to report PDF (6.2 MB)Summary

Mount St. Helens seized the world’s attention in 1980 when the largest historical landslide on Earth and a powerful explosive eruption reshaped the volcano, created its distinctive crater, and dramatically modified the surrounding landscape. An enormous lava dome grew episodically in the crater until 1986, when the volcano became relatively quiet. A new glacier grew in the crater, wrapping around and partly burying the lava dome. From 1987 to 2003, sporadic earthquake swarms and small steam explosions indicated that magma (molten rock) was being replenished deep underground. In 2004, steam-and-ash explosions heralded the start of another eruption. A quieter phase of continuous lava extrusion followed and lasted until 2008, building a new dome and doubling the volume of lava on the crater floor. Scientists with the U.S. Geological Survey and University of Washington’s Pacific Northwest Seismograph Network maintain constant watch for signs of renewed activity at Mount St. Helens and other Cascade volcanoes. Now is an ideal time for both actual and virtual visitors to Mount St. Helens to learn more about dramatic changes taking place on and beneath this active volcano.

Last modified May 28, 2013
First posted April 23, 2013

  • Report PDF (6.2 MB)
  • Videos folder. These six videos are linked from within the report and also available as individual files here (310 MB)
  • Transcripts folder. Files for use with assistive technology (10 kB)
  • This report is also available in print from:

    USGS Information Services, Box 25286,
    Federal Center, Denver, CO 80225
    telephone: 888 ASK-USGS; e-mail: infoservices@usgs.gov

For additional information:
Contact CVO
Volcano Science Center, Cascades Volcano Observatory
U.S. Geological Survey
1300 SE Cardinal Court, Building 10, Suite 100
Vancouver, WA 98683-9589
http://vulcan.wr.usgs.gov/

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Suggested citation:

Dzurisin, D., Driedger, C.L., and Faust, L.M., 2013, Mount St. Helens, 1980 to now—what’s going on?: U.S. Geological Survey Fact Sheet 2013–3014, v. 1.1, 6 p. and videos. (Available at http://pubs.usgs.gov/fs/2013/3014/.)


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