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May 2000
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WEB FEATURE NEWS AND VIEWS
features.html Mount St. Helens 20 Years Later
by Robert I. Tilling

What have volcanologists learned from the May 18, 1980, eruption of Mount St. Helens, the worst volcanic disaster in U.S. recorded history? The volcanologist who directed the Volcano Hazards Program of the U.S. Geological Survey in 1980 offers his perspective.

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ON THE COVER DEPARTMENTS
Cover Image cover.html  
Mount St. Helens as it appears today from the northwest. The May 18, 1980, eruption produced a debris avalanche that deposited the hummocky terrain (foreground). See feature story. Photo by David E. Wieprecht, USGS Cascades Volcano Observatory.
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