Mount St. Helen
- Cascades Volcano Observatory (U.S. Geological Survey)
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Effects of Pyroclastic Surge at Mount St. Helens, Washington
May 18, 1980
(Volcano Hazards Program, U.S. Geological Survey) -
Landslide at Mount St. Helens Volcano
Triggers Explosive Eruption on May
18, 1980 (Volcano Hazards Program, U.S. Geological Survey) - Mount St. Helens - From the 1980 Eruption to 2000 (U.S. Geological Survey)
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Mount St. Helens Officially Slumbers- Alert Level Goes Back to Norma,
July 20,
2008 (U.S. Geological Survey) - Mount St. Helens Recovery (U.S. Army Corps of Engineers)
- Mount St. Helens, Washington (U.S. Geological Survey)
- Where did the Name "Mount St. Helens" Come From? (U.S. Geological Survey)
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Other Related Information: Washington State