Deformation monitoring at Mount St. Helens in 1981 and 1982
Science
By: W.W. Chadwick Jr., D. A. Swanson, E.Y. Iwatsubo, C. C. Heliker, and T.A. Leighley
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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.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Deformation monitoring at Mount St. Helens in 1981 and 1982 |
| Series title | Science |
| DOI | 10.1126/science.221.4618.1378 |
| Volume | 221 |
| Issue | 4618 |
| Year Published | 1983 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Description | 3 p. |
| First page | 1378 |
| Last page | 1380 |
| Country | United States |
| State | Washington |
| Other Geospatial | Mount St. Helens |