INVESTIGADORES
PREZZI Claudia Beatriz
congresos y reuniones científicas
Título:
Ongoing seismological investigations around Villarrica volcano, southern Chile.
Autor/es:
DZIERMA, Y.; THORWART, M.; RABBEL, W.; COMTE, D.; LEGRAND, D.; BATAILLE, K.; IGLESIA, P.; PREZZI, CLAUDIA BEATRIZ
Lugar:
Kiel
Reunión:
Congreso; 69 Jahrestagung der Deutschen Geophysikalischen Gesellschaft; 2009
Resumen:
In addition to presenting a continental end-member of subduction zones, seismicity and volcanism in the Chilean subduction zone are influenced strongly by sediment input into the trench, oblique convergence and strain partitioning, and pre-Andean characteristics of the overriding plate. Furthermore, the occurrence of the largest instrumentally recorded earthquake, the Valdivia 1960 earthquake, close to the very active Villarrica volcano, makes this region ideally suited for subduction-related hazard investigations. A network of 55 seismological stations was installed in November 2008 between 39 deg and 40 deg South. The stations are distributed from the coast to the back-arc in Argentina, linking the Villarrica Volcano with the area of maximum coseismic slip of the 1960 Valdivia earthquake. The data collected by this network will serve for local and teleseismic tomography, seismicity, receiver function and anisotropy studies. This poster presents first data examples. In addition to exploring the deep structure and geometry of the subduction zone, these studies will provide insight into the presence of fluids, fluid pathways, and the stress field. In combination with geochemical and volcanological studies also performed by the SFB 574, these investigations will contribute to a better understanding of subduction zone characteristics in a region of extreme coseismic stress, slab-arc fluid processes, volcano dynamics and hazards.