AN APPLICATION OF CROSS-CORRELATION OF RANDOM FIELDS TO VOLCAN DE COLIMA, MÉXICO

We present preliminary results of an example of seismic noise processing to produce Rayleigh and Love waves group velocity maps for the region below Volcán de Colima, México. Data used is from a two years deployment of twenty three-component broadband seismometers located within 20 km around the volcán de Colima from the CODEX experiment, a collaborative project between University of Alaska Fairbanks and the Observatorio Vulcanológico, Universidad de Colima, México. Since the background seismic noise mainly consist of surface waves the emerging signal of the noise correlation function allows us to retrive the Green’s function between two stations. We correlated signals recorded on the components that correspond to the non zero terms of the theoretical elastic Green’s tensor : ZZ, ZR, RZ, RR and TT. We evaluated Rayleigh an Love waves dispersion curves from the emerging Green’s functions for each of the inter-station paths and applied a tomographic inversion to obtain group velocity maps.