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Science 5 November 1993:
Vol. 262. no. 5135, pp. 889 - 892
DOI: 10.1126/science.262.5135.889
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Articles

Controls on Geyser Periodicity

S. E. Ingebritsen 1 and S. A. Rojstaczer 2

1 U. S. Geological Survey, Menlo Park, CA 94025
2 Department of Geology, Duke University, Durham, NC 27708

Geyser eruption frequency is not constant over time and has been shown to vary with small (le10–6) strains induced by seismic events, atmospheric loading, and Earth tides. The geyser system is approximated as a permeable conduit of intensely fractured rock surrounded by a less permeable rock matrix. Numerical simulation of this conceptual model yields a set of parameters that controls geyser existence and periodicity. Much of the responsiveness to remote seismicity and other small strains in the Earth can be explained in terms of variations in permeability and lateral recharge rates.

Submitted on July 27, 1993
Accepted on September 3, 1993


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Science. ISSN 0036-8075 (print), 1095-9203 (online)