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Science 21 September 2001:
Vol. 293. no. 5538, pp. 2231 - 2233
DOI: 10.1126/science.1063463
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Reports

Changes in Seismic Anisotropy After Volcanic Eruptions: Evidence from Mount Ruapehu

Vicki Miller,* Martha Savagedagger

The eruptions of andesite volcanoes are explosively catastrophic and notoriously difficult to predict. Yet changes in shear waveforms observed after an eruption of Mount Ruapehu, New Zealand, suggest that forces generated by such volcanoes are powerful and dynamic enough to locally overprint the regional stress regime, which suggests a new method of monitoring volcanoes for future eruptions. These results show a change in shear-wave polarization with time and are interpreted as being due to a localized stress regime caused by the volcano, with a release in pressure after the eruption.

Institute of Geophysics, Victoria University of Wellington, Wellington, New Zealand.
*   Present address: Upper Hutt City Council, Private Bag 907, Upper Hutt, New Zealand.

dagger    To whom correspondence should be addressed. E-mail: Martha.Savage{at}vuw.ac.nz

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Temporal and Spatial Variation of Local Stress Fields before and after the 1992 Eruptions of Crater Peak Vent, Mount Spurr Volcano, Alaska.
D. C. Roman, S. C. Moran, J. A. Power, and K. V. Cashman (2004)
Bulletin of the Seismological Society of America 94, 2366-2379
   Abstract »    Full Text »    PDF »
Seismic Anisotropy Beneath Ruapehu Volcano: A Possible Eruption Forecasting Tool.
A. Gerst and M. K. Savage (2004)
Science 306, 1543-1547
   Abstract »    Full Text »    PDF »
Changes in the Coda Decay Rate and Shear-Wave Splitting Parameters Associated with Seismic Swarms at Mt. Vesuvius, Italy.
E. Del Pezzo, F. Bianco, S. Petrosino, and G. Saccorotti (2004)
Bulletin of the Seismological Society of America 94, 439-452
   Abstract »    Full Text »    PDF »
Coda Wave Interferometry for Estimating Nonlinear Behavior in Seismic Velocity.
R. Snieder, A. Gret, H. Douma, and J. Scales (2002)
Science 295, 2253-2255
   Abstract »    Full Text »    PDF »
Seismic Anisotropy and Global Geodynamics.
J.-P. Montagner and L. Guillot (2002)
Reviews in Mineralogy and Geochemistry 51, 353-385
   Full Text »    PDF »


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