Source spectral phases of surface waves recovered from observed spectral amplitudes by using Hilbert transforms |
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| Authors: | Xavier Lana Antoni M Correig |
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| Institution: | (1) Department de Fisica de la Terra i del Cosmos, Universitat de Barcelona, Diagonal 645, 08028 Barcelona;(2) Laboratori d'Estudis Geofisics Eduard Fontserè, Institut d'Estudis Catalans, Carme 47, 08001 Barcelona |
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| Abstract: | Spectral phases of surface waves radiated at the seismic source are recovered by means of the Hilbert transform of spectral amplitudes. Through numerical simulations as well as the study of an earthquake with well known focal mechanism, it is shown that the recovered phases satisfy a criterion of coherency, so that they can be used in an inversion process for the retrieval of the seismic moment tensor. |
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