Volcano deformation survey over the Northern and Central Andes with ALOS InSAR time series

Anieri M. Morales Rivera, Falk C Amelung, Patricia Mothes

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2869-2883
Number of pages15
JournalGeochemistry, Geophysics, Geosystems
Volume17
Issue number7
DOIs
StatePublished - Jul 1 2016

Keywords

  • Andes
  • InSAR time series
  • volcano deformation

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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