Ground Deformation between 2002 and 2013 from InSAR Observations

MARIA LAURA VELEZ; EUILLADES, PABLO; BLANCO, MAURO; EUILLADES, LEONARDO

Copahue Volcano

Springer-Verlag

Lugar: Berlin Heidelberg; Año: 2015; p. 175 - 198

Ground deformation is one of the main geophysical methods for volcanomonitoring. Surface deformation patterns can provide important insightsinto the structure, plumbing system, and state of restless volcanoes. Copahuevolcano is one of the most active eruptive centers in Argentina, and a majorrisk factor for the nearby towns of Caviahue and Copahue. Historic eruptiveactivity involved low intensity phreatic and phreatomagmatic events in1992, 1995 and 2000. A new eruptive cycle is ongoing since June 2012, withseveral phreatic explosions and one phreatomagmatic?magmatic eruptionon December 22nd, 2012. In this work, the Small Baseline Subsets (SBAS)DInSAR-based technique is successfully applied to compute surfacedisplacements using the ENVISAT ASAR radar imagery during quiescentand pre-eruptive periods. Our purpose is to investigate possible sources ofground deformation to better understand the system behavior. Analyticalmodels are used to interpret geodetic data and to constrain the parametersthat characterize the source responsible for the observed deformation.