Open AccessVolcano deformation survey over the Northern and Central Andes with ALOS InSAR time series
Author(s) -
Morales Rivera Anieri M.,
Amelung Falk,
Mothes Patricia
Publication year - 2016
Publication title -
geochemistry, geophysics, geosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.928
H-Index - 136
ISSN - 1525-2027
DOI - 10.1002/2016gc006393
Subject(s) - geology , volcano , interferometric synthetic aperture radar , deformation (meteorology) , subsidence , seismology , magma , synthetic aperture radar , geodesy , geomorphology , remote sensing , oceanography , structural basin
We use ALOS‐1 Interferometric Synthetic Aperture Radar data spanning the period of 2007–2011 to obtain time‐dependent ground deformation data over all of the volcanoes in Colombia, Ecuador, and Peru. We detect deformation on or near the proximity of Galeras, Reventador, Tungurahua, Guagua Pichincha, Sangay, and Cerro Auquihuato volcanoes, uncovering previously undocumented deformation in the latter three. Deformation is attributed to changes in pressurization of the volcanic systems (Galeras, Tungurahua, Guagua Pichincha, and Cerro Auquihuato), subsidence associated with flow deposits (Reventador), and flank creep (Sangay). Our models suggest that the pressure sources are located at depths of ∼1–6 km from the surface, indicating that the measurable deformation within our data is restricted to shallow magma chambers and hydrothermal systems.