Tomografía sísmica 2D en atenuación de la isla Decepción, Antártida.

Abstract

Deception Island is the most active and documented volcano in the South Shetland Islands (Antarctica). Since its last eruption (1970) several experiments have targeted an improved reconstruction of its magmatic systems. Geophysical imaging has provided new insight into Deception’s interior, particularly when using space-weighted seismic attenuation tomography for coda waves. Here, we apply sensitivity kernels and a novel inversion strategy to obtain a frequency-dependent model of the magmatic systems at Deception Island using active data, where particular care has been put on data selection and model optimisation. The results have been framed in the extensive knowledge of the geology and the geomorphology of the volcano with a Geographic Information System. This inter- and multi-disciplinary analysis will become a tool to improve the interpretation of the dynamics of Deception Island and its related hazards