Vulcanian explosion at Soufriére Hills Volcano, Montserrat on March 2004 as revealed by strain data

Alan T. Linde, Selwyn Sacks, D. Hidayat, B. Voight, A. Clarke, D. Elsworth, G. Mattioli, P. Malin, E. Shalev, S. Sparks, C. Widiwijayanti

Research output: Contribution to journalArticle

26 Citations (Scopus)

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 Soufrire 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.

Original languageEnglish (US)
Article numberL00E07
JournalGeophysical Research Letters
Volume37
Issue number6
DOIs
StatePublished - Mar 1 2010

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volcanoes
rock intrusions
explosions
dike
explosion
volcano
CALIPSO
recovery
CALIPSO (Pathfinder satellite)
monitoring system
dome
domes
GPS
polarity
geometry

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Linde, Alan T. ; Sacks, Selwyn ; Hidayat, D. ; Voight, B. ; Clarke, A. ; Elsworth, D. ; Mattioli, G. ; Malin, P. ; Shalev, E. ; Sparks, S. ; Widiwijayanti, C. / Vulcanian explosion at Soufriére Hills Volcano, Montserrat on March 2004 as revealed by strain data. In: Geophysical Research Letters. 2010 ; Vol. 37, No. 6.
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Linde, AT, Sacks, S, Hidayat, D, Voight, B, Clarke, A, Elsworth, D, Mattioli, G, Malin, P, Shalev, E, Sparks, S & Widiwijayanti, C 2010, 'Vulcanian explosion at Soufriére Hills Volcano, Montserrat on March 2004 as revealed by strain data', Geophysical Research Letters, vol. 37, no. 6, L00E07. https://doi.org/10.1029/2009GL041988

Vulcanian explosion at Soufriére Hills Volcano, Montserrat on March 2004 as revealed by strain data. / Linde, Alan T.; Sacks, Selwyn; Hidayat, D.; Voight, B.; Clarke, A.; Elsworth, D.; Mattioli, G.; Malin, P.; Shalev, E.; Sparks, S.; Widiwijayanti, C.

In: Geophysical Research Letters, Vol. 37, No. 6, L00E07, 01.03.2010.

Research output: Contribution to journalArticle

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