CHARACTERIZATION OF CONTINENTAL CRUST BENEATH THE SOUTH-CENTRAL UNITED STATES USING REVERBERATION-REMOVED RECEIVER FUNCTIONS
To effectively remove the reverberations, we have recently developed a resonance-removal filter (Yu et al., 2015, Journal of Geophysical Research, http://dx.doi.org/10.1002/2014JB011610 ) and applied it to several areas in south-central United States. Preliminary results show that the Moho can be reasonably imaged at most of the USArray and other broadband seismic stations. Systematic spatial variations of crustal thickness and the Vp/Vs ratio (which is uniquely related to the better-known Poisson’s ratio) are found. Significantly thinned crust beneath the OCTZ and the New Madrid Seismic Zone is revealed, while ancient collisional zones are associated with notably thickened crust. Details about the findings and their tectonic implications will be presented.