Artículo

Velez, M.L.; Euillades, P.; Caselli, A.; Blanco, M.; Díaz, J.M. "Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm" (2011) Journal of Volcanology and Geothermal Research. 202(1-2):117-126
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Abstract:

The Copahue volcano is one of the most active volcanoes in Argentina with eruptions having been reported as recently as 1992, 1995 and 2000. A deformation analysis using the Differential Synthetic Aperture Radar technique (DInSAR) was performed on Copahue-Caviahue Volcanic Complex (CCVC) from Envisat radar images between 2002 and 2007. A deformation rate of approximately 2 cm/yr was calculated, located mostly on the north-eastern flank of Copahue volcano, and assumed to be constant during the period of the interferograms. The geometry of the source responsible for the deformation was evaluated from an inversion of the mean velocity deformation measurements using two different models based on pressure sources embedded in an elastic homogeneous half-space. A genetic algorithm was applied as an optimization tool to find the best fit source. Results from inverse modelling indicate that a source located beneath the volcano edifice at a mean depth of 4 km is producing a volume change of approximately 0.0015 km/yr. This source was analysed considering the available studies of the area, and a conceptual model of the volcanic-hydrothermal system was designed. The source of deformation is related to a depressurisation of the system that results from the release of magmatic fluids across the boundary between the brittle and plastic domains. These leakages are considered to be responsible for the weak phreatic eruptions recently registered at the Copahue volcano. © 2011 Elsevier B.V.

Registro:

Documento: Artículo
Título:Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm
Autor:Velez, M.L.; Euillades, P.; Caselli, A.; Blanco, M.; Díaz, J.M.
Filiación:Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
Instituto CEDIAC, Facultad de Ingeniería, Universidad de Cuyo, Mendoza, Argentina
Departamento de Geodinámica, Universidad Complutense de Madrid, Spain
Palabras clave:Copahue volcano; Deformation source; Genetic algorithm; SBAS-DInSAR; Subsidence; Volcanic-hydrothermal system; Active volcanoes; Argentina; Best fit; Conceptual model; Copahue volcano; D-inSAR; Deformation analysis; Deformation rates; Differential synthetic aperture radar; ENVISAT; Half-space; Hydrothermal system; InSAR data; Interferograms; Inverse modelling; Magmatic fluids; Mean velocities; Optimization tools; Phreatic; Pressure source; Radar image; SBAS-DInSAR; Volcanic complex; Volume change; Deformation; Genetic algorithms; Geodetic satellites; Imaging systems; Radar; Subsidence; Synthetic aperture radar; Volcanoes; data inversion; Envisat-1; genetic algorithm; hydrothermal system; phreatic zone; subsidence; volcanic eruption; Argentina; Copahue; Neuquen; Southern Volcanic Zone
Año:2011
Volumen:202
Número:1-2
Página de inicio:117
Página de fin:126
DOI: http://dx.doi.org/10.1016/j.jvolgeores.2011.01.012
Título revista:Journal of Volcanology and Geothermal Research
Título revista abreviado:J. Volcanol. Geotherm. Res.
ISSN:03770273
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03770273_v202_n1-2_p117_Velez

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Citas:

---------- APA ----------
Velez, M.L., Euillades, P., Caselli, A., Blanco, M. & Díaz, J.M. (2011) . Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm. Journal of Volcanology and Geothermal Research, 202(1-2), 117-126.
http://dx.doi.org/10.1016/j.jvolgeores.2011.01.012
---------- CHICAGO ----------
Velez, M.L., Euillades, P., Caselli, A., Blanco, M., Díaz, J.M. "Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm" . Journal of Volcanology and Geothermal Research 202, no. 1-2 (2011) : 117-126.
http://dx.doi.org/10.1016/j.jvolgeores.2011.01.012
---------- MLA ----------
Velez, M.L., Euillades, P., Caselli, A., Blanco, M., Díaz, J.M. "Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm" . Journal of Volcanology and Geothermal Research, vol. 202, no. 1-2, 2011, pp. 117-126.
http://dx.doi.org/10.1016/j.jvolgeores.2011.01.012
---------- VANCOUVER ----------
Velez, M.L., Euillades, P., Caselli, A., Blanco, M., Díaz, J.M. Deformation of Copahue volcano: Inversion of InSAR data using a genetic algorithm. J. Volcanol. Geotherm. Res. 2011;202(1-2):117-126.
http://dx.doi.org/10.1016/j.jvolgeores.2011.01.012