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Eruptions of Mount St. Helens: Past, Present, and Future

by Robert I. Tilling, Lyn Topinka, and Donald A. Swanson

Version 1.01

March 19, 2002: The page debris.html was revised because the velocity of the debris avalanche of 18 May 1980 was overestimated as the result of a typographical error. The incorrect speed of "155 to 180 miles an hour" has been changed to "110 to 155 miles an hour."


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Contact: John Watson

Last updated: 03.19.02