Regional Surface Wave Studies in South America

In this work we summarize the major conclusions achieved in our search for improvements on knowledge of the crustal and upper mantle structure In South America using Rayleigh, waves group and phase velocity information. A new data set, consisting of group and phase velocity measurements using seismological stations located within Brazil made possible the current results. These data measured using surface wave records of the BDF' RDJ, and BEB stations, added to our previously' organized group and phase velocity global data base, represent a significant improvement on the study of the South American Plate using surface waves. Major results achieved up to this stage of the project show that the data collected at the brazilian stations are consistent and comparable to others measured at other regions with similar tectonic setting. We have also used the data for computation of regional models good for the South American Plate.