Elastic properties analysis in the seismic Guerrero’s Gap through of seismic noise tomography

English Abstract:

The results of an ambient seismic noise tomography are presented. The study area contains the southern part of Oaxaca and most of Guerrero where NVT has been previously identified. The tomography consists of cross correlations between concurrently installed stations and non-concurrently installed stations using the codas of cross correlation or the C3 method (Sthely et al., 2008). This method has been proved as a good tool for increasing the resolution of the results the tomography studies of surfaces waves when the stations are badly oriented with respect noise sources by providing more data. Dispersion curves were calculated from the correlations and then a simulated annealing inversion was applied to obtain the shear wave velocity models for 45 couples of stations belonging to GGAP mini array and the Meso-America Subduction Experiment (MASE) array and 8 stations from the Mexican National Seismic Service (SSN). Here we characterize the crustal structure where NVT and SSE have been found.