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Science 16 February 1979:
Vol. 203. no. 4381, pp. 654 - 656
DOI: 10.1126/science.203.4381.654
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Articles

Hydraulic Transients: A Seismic Source in Volcanoes and Glaciers

WILLIAM ST. LAWRENCE 1 and ANTHONY QAMAR 2

1 U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, New Hampshire 03755
2 Department of Geology, University of Montana, Missoula 59812

A source for certain low-frequency seismic waves is postulated in terms of the water hammer effect. The time-dependent displacement of a water-filled sub-glacial conduit is analyzed to demonstrate the nature of the source. Preliminary energy calculations and the observation of hydraulically generated seismic radiation from a dam indicate the plausibility of the proposed source.

Submitted on June 19, 1978
Revised on October 4, 1978


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Seismic signals preceding the explosive eruption of Mount St. Helens, Washington, on 18 May 1980.
A. QAMAR, W. ST. LAWRENCE, J. N. MOORE, and G. KENDRICK (1983)
Bulletin of the Seismological Society of America 73, 1797-1813
   Abstract »    PDF »
Resonant scattering by fluid-filled cavities.
G. A. MCMECHAN (1982)
Bulletin of the Seismological Society of America 72, 1143-1153
   Abstract »    PDF »


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