Seismological Imaging

Teleseismic events recorded at the stations Alankar (ALN) and Kozhikode (KZD), placed along the Western Ghats of India are used in delineating the structures and mapping the crustal discontinuities present by using the method of Receiver Function Analysis. But, the separation of the structural effects below a seismic station from other effects like structures far away or from source–time functions are the fundamental problem of the receiver function technique. The popular technique of deconvolving the SV-component by the P-component suppresses the effects of source and near source structures. Hence, a Cross-convolution misfit function method for Inversion of Receiver Function that avoids deconvolution has been approached in the study. This misfit measure is used to construct a likelihood probability function and carry out a Trans-Dimensional Bayesian inversion for shear wave structure. The teleseismic events recorded at the stations are jointly inverted (radial RF and Surface Wave Dispersions) to give a 1-D probabilistic seismic velocity model beneath the stations. This novel approach helps to determine the various discontinuities present along the lithosphere and also to determine the depth to Moho (crust-mantle boundary) along these stations.