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Deformation monitoring at Mount St. Helens in 1981 and 1982

Science

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Abstract

For several weeks before each eruption of Mount St. Helens in 1981 and 1982, viscous magma rising in the feeder conduit inflated the lava dome and shoved the crater floor laterally against the immobile crater walls, producing ground cracks and thrust faults. The rates of deformation accelerated before eruptions, and thus it was possible to predict eruptions 3 to 19 days in advance. Lack of deformation outside the crater showed that intrusion of magma during 1981 and 1982 was not voluminous.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Deformation monitoring at Mount St. Helens in 1981 and 1982
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:
1378
Last page:
1380
Number of Pages:
3