Inflación Post-eruptiva del Complejo Volcánico Puyehue-Cordón Caulle

EUILLADES, PABLO; BLANCO, MAURO; EUILLADES, LEONARDO; VELEZ, MARÍA LAURA; GROSSE, PABLO

San Miguel de Tucumán

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

The Puyehue-Cordón Caulle Volcanic Complex islocated in the active frontal arc of the Andean Southern Volcanic Zone (SVZ).Its last eruption, occurred between June 2011 and March 2012, was accompaniedof subsidence reaching 1.3 m at the Caldera Nevada. In this work, we reportdeformation results of the post-eruptive phase. We processed scenes acquired bythe COSMO-Skymed and ALOS2/PALSAR sensors between November 2012 and February2017. The results show two post-eruptive inflation pulses: a first onebeginning almost immediately after the end of the eruption, and a second one,still active, after a yearlong period of relative quiescence. We also inversemodeled the deformation in order to estimate source parameters. Spherical andspheroidal cavities located between 8 and 10 km under the graben seems to beresponsible of the observed uplift.