Mantle and crust anisotropy in the eastern China region inferred from waveform splitting of SKS and PpSms

S-waves converted from P-wave at different boundaries inside the earth, i.e ., the Moho discontinuity and CMB, are used to determine the distribution o f anisotropy in different layers. A clear later phase at approximately 17 s ec after the direct P-wave, which is identified to be PpSms (a phase that i s P-to-S converted at the free surface and is reflected by the Moho discont inuity on the receiver side), is observed in the radial component of seismo grams recorded by broadband stations in the east China region. Waveform spl itting observed from the PpSms and SKS suggests that the crust beneath the eastmost part of China is almost isotropic, and the mantle is weakly anisot ropic. Splitting analysis using converted waves is a promising technique fo r investigating the depth distribution of shear-wave splitting.