Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack

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Abstract

An explosive eruption of Mount St. Helens on 19 March 1982 had substantial impact beyond the vent because hot eruption products interacted with a thick snowpack. A blast of hot pumice, dome rocks, and gas dislodged crater-wall snow that avalanched through the crater and down the north flank. Snow in the crater swiftly melted to form a transient lake, from which a destructive flood and lahar swept down the north flank and the North Fork Toutle River.

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Publication type Article
Publication Subtype Journal Article
Title Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack
Series title Science
DOI 10.1126/science.221.4618.1394
Volume 221
Issue 4618
Year Published 1983
Language English
Publisher American Association for the Advancement of Science
Contributing office(s) Volcano Hazards Program
Description 4 p.
First page 1394
Last page 1397
Country United States
State Washington
Other Geospatial Mount St. Helens
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