Receiver functions for three-layer media

摘要

We have extended the H-k stacking method of receiver functions applicable to a three-layer model, which is useful in studying detailed crustal structures. We have demonstrated its application with two sample sites in Taiwan, making use of travel times of converted phases from the direct P waves of teleseismic events as the P reflects and refracts at different discontinuities in the crust. This three-layer extension allows a closer examination on the crust, as well as the relationship between crustal layers and the associated V-p/V-s ratios. Data were processed using the multiple-taper correlation technique to obtain the radial receiver functions (RRFs). The relative time delays of the converted phases measured from the RRFs were used to estimate the depths of the crustal discontinuities. Results not only yield the depths to principal crustal layers, including the Moho, but also give the corresponding ranges of V-p/V-s ratio which are comparable with findings from other tomographic studies.