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Open access
Autor(in)
Datum
2020-09-04Typ
- Master Thesis
ETH Bibliographie
yes
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Abstract
Since December 2018, the first seismic network deployed around the Austral Andes and its Southern Patagonian Ice Field is recording passive seismicity at the western margin of Southern Patagonia, Southernmost South America. Here, active tectonics is dominated by the interplay between the Antarctic plate's subduction at the trench and the sinistral transform movement of the Scotia plate to the south.
This research shows the first catalogue of crustal seismicity located in this region, for almost a year of recording (from December 2018 to mid-November 2019). We finally localized 2685 seismic events, using an automatic event detection algorithm called REST, a new 1-D Minimum Velocity Model constrained with VELEST, and a probabilistic location approach using NonLinLoc.
We identified several seismicity clusters, from west to east: in the forearc, under the Reclus volcano, and in different sections of the fold and thrust belt. Additionally, seismic events aligned with the transform boundary to the south suggest a broader area of active deformation. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000473652Publikationsstatus
publishedVerlag
ETH ZurichThema
Seismicity and Tectonics; Andes; Austral Andes; Patagonia; Patagonian Andes; Chile; Argentina; Active tectonics; Reclus volcanoOrganisationseinheit
02818 - Schweiz. Erdbebendienst (SED) / Swiss Seismological Service (SED)
ETH Bibliographie
yes
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