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Froger et al. 2004
Froger, J.-L., Fukushima, Y., Briole, P., Staudacher, T., Souriot, T. and Villeneuve, N. (2004). The deformation field of the August 2003 eruption at Piton de la Fournaise, Reunion Island, mapped by ASAR interferometry. Geophysical Research Letters 31: doi: 10.1029/2004GL020479. issn: 0094-8276.

Three independent ASAR interferograms spanning the August 2003 Piton de la Fournaise eruption, reveal a 3 by 3 km asymmetric pattern of range changes centred on the Dolomieu crater northern flank. It corresponds to 30 cm of displacement towards the satellite east of the eruptive fissures and 7 cm away from the satellite west of the fissures. Displacements are caused by dyke emplacement below fissures. We model the deformation using a 3D mixed boundary element method for elastic media. This consists of a dyke defined by six geometric parameters and an overpressure gradient. A neighbourhood algorithm was applied to explore this 7 dimensional parameter space. The best-fit model is a 57¿ eastward dipping dyke with a base lying around 1520 m a.s.l. The model provides new evidence of the dyke intrusion -- related seaward displacements of the volcano eastern flank.

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Abstract

Keywords
Exploration Geophysics, Remote sensing, Geodesy and Gravity, Standards and absolute measurements, Mathematical Geophysics, Modeling, Radio Science, Interferometry, Volcanology, Eruption monitoring
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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