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Imaging the Western Iberia Seismic Structure from the Crust to the upper Mantle from Ambient Noise Tomography

AutorGraça Silveira, G.; Kiselev, S.; Stutzmann, E.; Schimmel, Martin ; Haned, A.; Dias, Nuno A.; Morais, I.; Custódio, S.
Fecha de publicación1-abr-2015
EditorEuropean Geosciences Union
CitaciónEuropean Geosciences Union General Assembly 2015 Vienna, Austria 12 – 17 April 2015
ResumenAmbient Noise Tomography (ANT) is now widely used to image the subsurface seismic structure, with a resolution mainly dependent on the seismic network coverage. Most of these studies are limited to Rayleigh waves for periods shorter than 40/45 s and, as a consequence, they can image only the crust or, at most, the uppermost mantle. Recently, some studies successfully showed that this analysis could be extended to longer periods, thus allowing a deeper probing. In this work we present the combination of two complementary datasets. The first was obtained from the analysis of ambient noise in the period range 5-50 sec, for Western Iberia, using a dense temporary seismic network that operated between 2010 and 2012. The second one was computed for a global study, in the period erange 30-250 sec, from analysis of 150 stations of the global networks GEOSCOPE and GSN.
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