1. Source Model for Sabancaya Volcano Constrained by DInSAR and GNSS Surface Deformation Observation
- Author
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Pablo A. Euillades, Rafael Miranda Cruz, Gregorio Boixart, Maurizio Battaglia, Luis Cruz, and Leonardo D. Euillades
- Subjects
ground deformation modelling ,volcano deformation ,010504 meteorology & atmospheric sciences ,Science ,Inversion (geology) ,Deformation (meteorology) ,Volume change ,010502 geochemistry & geophysics ,01 natural sciences ,purl.org/becyt/ford/1 [https] ,purl.org/becyt/ford/1.5 [https] ,Interferometría de radar ,INTERFEROMETRIC SYNTHETIC APERTURE RADAR ,Deformación ,interferometric synthetic aperture radar ,GNSS ,volcano geodesy ,Interferometric synthetic aperture radar ,Surface deformation ,Source model ,0105 earth and related environmental sciences ,geography ,Volcanes ,VOLCANO GEODESY ,geography.geographical_feature_category ,Tectónica ,Geodesy ,GROUND DEFORMATION MODELLING ,Volcano ,GNSS applications ,General Earth and Planetary Sciences ,VOLCANO DEFORMATION ,Geology - Abstract
Sabancaya is the most active volcano of the Ampato-Sabancaya Volcanic Complex (ASVC) in southern Peru and has been erupting since 2016. The analysis of ascending and descending Sentinel-1 orbits (DInSAR) and Global Navigation Satellite System (GNSS) datasets from 2014 to 2019 imaged a radially symmetric inflating area, uplifting at a rate of 35 to 50 mm/yr and centered 5 km north of Sabancaya. The DInSAR and GNSS data were modeled independently. We inverted the DInSAR data to infer the location, depth, and volume change of the deformation source. Then, we verified the DInSAR deformation model against the results from the inversion of the GNSS data. Our modelling results suggest that the imaged inflation pattern can be explained by a source 12 to 15 km deep, with a volume change rate between 26 x 106 m3/yr and 46 x 106 m3/yr, located between the Sabancaya and Hualca Hualca volcano. The observed regional inflation pattern, concentration of earthquake epicenters north of the ASVC, and inferred location of the deformation source indicate that the current eruptive activity at Sabancaya is fed by a deep regional reservoir through a lateral magmatic plumbing system. Fil: Boixart, Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Cruz, Luis F.. Universidad Nacional de San Agustin; Perú Fil: Miranda Cruz, Rafael. Universidad Nacional de San Agustin; Perú Fil: Euillades, Pablo Andrés. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Euillades, Leonardo Daniel. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Battaglia, Maurizio. Università di Roma; Italia
- Published
- 2020
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