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

Science

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, , , , , and

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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.

Additional Publication Details

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
Volume
221
Issue:
4618
Year Published:
1983
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1394
Last page:
1397
Number of Pages:
4