| 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. |
| Genre: | Article |
| ProdID: | 70011205 |
| Citation Author: | Chadwick, Jr. , W. W.; Swanson, D. A.; Iwatsubo, E. Y.; Heliker, C. C.; Leighley, T. A. |
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| Citation End Page: | 1380 |
| Citation Issue: | 4618 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Deformation monitoring at Mount St. Helens in 1981 and 1982; 1983; Article; Journal; Science; Chadwick, Jr. , W. W.; Swanson, D. A.; Iwatsubo, E. Y.; Heliker, C. C.; Leighley, T. A. |
| Citation Start Page: | 1378 |
| Citation Volume: | 221 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | Deformation monitoring at Mount St. Helens in 1981 and 1982; 1983; Article; Journal; Science; Chadwick, Jr. , W. W.; Swanson, D. A.; Iwatsubo, E. Y.; Heliker, C. C.; Leighley, T. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1983 00:00 -0600 |
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