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Science 18 April 2003:
Vol. 300. no. 5618, pp. 478 - 480
DOI: 10.1126/science.1082205
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Reports

Mantle Fault Zone Beneath Kilauea Volcano, Hawaii

Cecily J. Wolfe,1* Paul G. Okubo,2 Peter M. Shearer3

Relocations and focal mechanism analyses of deep earthquakes (>=13 kilometers) at Kilauea volcano demonstrate that seismicity is focused on an active fault zone at 30-kilometer depth, with seaward slip on a low-angle plane, and other smaller, distinct fault zones. The earthquakes we have analyzed predominantly reflect tectonic faultingin the brittle lithosphere rather than magma movement associated with volcanic activity. The tectonic earthquakes may be induced on preexisting faults by stresses of magmatic origin, although background stresses from volcano loading and lithospheric flexure may also contribute.

1 Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, Honolulu, HI96822, USA.
2 Hawaiian Volcano Observatory, U.S. Geological Survey, Hawaii National Park, HI96718, USA.
3 Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA 92093–0225, USA.

* To whom correspondence should be addressed. E-mail: wolfe{at}hawaii.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Southern California Hypocenter Relocation with Waveform Cross-Correlation, Part 2: Results Using Source-Specific Station Terms and Cluster Analysis.
P. Shearer, E. Hauksson, and G. Lin (2005)
Bulletin of the Seismological Society of America 95, 904-915
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Science. ISSN 0036-8075 (print), 1095-9203 (online)