TY - JOUR
T1 - The deformation field of the August 2003 eruption at Piton de la Fournaise, Reunion Island, mapped by ASAR interferometry
AU - Froger, J. L.
AU - Fukushima, Y.
AU - Briole, P.
AU - Staudacher, T.
AU - Souriot, T.
AU - Villeneuve, N.
PY - 2004/7/28
Y1 - 2004/7/28
N2 - 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.
AB - 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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U2 - 10.1029/2004GL020479
DO - 10.1029/2004GL020479
M3 - Article
AN - SCOPUS:4744350817
SN - 0094-8276
VL - 31
SP - L14601 1-5
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 14
ER -