Deformation Monitoring at Mount St. Helens in 1981 and 1982
- 30 September 1983
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 221 (4618) , 1378-1380
- https://doi.org/10.1126/science.221.4618.1378
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.Keywords
This publication has 4 references indexed in Scilit:
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- Deep Earthquakes Beneath Mount St. Helens: Evidence for Magmatic Gas Transport?Science, 1983
- Seismic Precursors to the Mount St. Helens Eruptions in 1981 and 1982Science, 1983
- Eruption Prediction Aided by Electronic Tiltmeter Data at Mount St. HelensScience, 1983