Teleseismic waveform modeling based on receiver function analysis is becoming a common method of examining crust and uppermost mantle structure. The purpose of this paper is to discuss and investigate the shear wave splitting and to calculate the orientation and degree of anisotropy using teleseismic P-waveform receiver functions. In addition to analytical calculations, the geological aspects of the anisotropic material within the crust and upper mantle are briefly discussed. Finally, the particle motion monitoring technique is applied to Ps converted phases that were recorded at the MAIO station. The result of this investigation would suggest N17°E orientation for the fast motion of shear wave in crustal structure of Mashhad (the center of Khorasan in the northeastern part of Iran) area.
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