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Title: Vulcanian explosion at Soufrière Hills Volcano, Montserrat on March 2004 as revealed by strain data
Authors: Linde, Alan T.
Clarke, A. B.
Malin, P.
Shalev, E.
Sparks, S.
Sacks, Selwyn
Hidayat, Dannie
Voight, Barry
Elsworth, Derek
Mattioli, Glen
Widiwijayanti, Christina
Keywords: DRNTU::Science::Geology::Volcanoes and earthquakes
Issue Date: 2010
Source: Linde, A. T., Sacks, S., Hidayat, D., Voight, B., Clarke, A. B., Elsworth, D., et al. (2010). Vulcanian explosion at Soufrière Hills Volcano, Montserrat on March 2004 as revealed by strain data. Geophysical research letters, 37.
Series/Report no.: Geophysical research letters
Abstract: The CALIPSO collaborative volcano monitoring system on the Caribbean island of Montserrat includes observations of strain at depths ∼200 m using Sacks-Evertson strainmeters. Strain data for the March 2004 explosion of the Soufrière Hills Volcano are characterized by large, roughly equal but opposite polarity changes at the two near sites and much smaller changes at a more distant site. The strain amplitudes eliminate a spherical pressure (Mogi-type) source as the sole contributor. The initial changes are followed by smaller recoveries, but with differing relative recovery magnitudes. This dissimilarity requires a minimum of two pressure sources, which we model as a deep spherical pressure source and a shallow dike. The spherical source is fixed at the location derived from data for the massive dome collapse in July 2003. We solve for the best fitting dike plus sphere source combination. The dike geometry is consistent with earlier interpretations of dikes based on GPS data and other lines of evidence.
ISSN: 0094-8276
DOI: 10.1029/2009GL041988
Rights: © 2010 American Geophysical Union. This paper was published in Geophysical Research Letters and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at the following official URL: [DOI:].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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