Inflación post-eruptiva del Complejo volcánico Puyehue-Cordón Caulle

EUILLADES, P. A.; BLANCO, M.; EUILLADES, L. D.; VELEZ, M. L.; GROSSE, P.

San Miguel de Tucumán

Congreso; XX Congreso Geológico Argentina; 2017

The Puyehue-Cordón Caulle Volcanic Complex is located in the active frontal arc of the Andean Southern Volcanic Zone (SVZ). Its last eruption, occurred between June 2011 and March 2012, was accompanied of subsidence reaching 1.3 m at the Caldera Nevada. In this work, we report deformation results of the post-eruptive phase. We processed scenes acquired by the COSMO-Skymed and ALOS2/PALSAR sensors between November 2012 and February 2017. The results show two post-eruptive inflation pulses: a first one beginning almost immediately after the end of the eruption, and a second one, still active, after a yearlong period of relative quiescence. We also inverse modeled the deformation in order to estimate source parameters. Spherical and spheroidal cavities located between 8 and 10 km under the graben seems to be responsible of the observed uplift.