Lianxing Wen -> Research -> Seismology -> Core-Mantle boundary -> Hybrid Method

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a) Schematic illustration of interfacings of hybrid method. The heterogeneous regions are assumed to be confined inside the small box, where finite-difference technique is applied. Generalized ray theory is used to calculate wave propagation from source to the finite-difference region and synthetic seismograms at the surface of Earth is obtained by integrating convolutions of output from the source-side along the line represented by triangles and Green's function from the receiver-side at same positions. The source-side output in positions represented by filled triangles is calculated by the generalized ray theory and that in positions represented by empty triangles is obtained from finite-difference calculation. b). The division of finite-difference region. Finite-difference region is divided into three parts, where different wave fields are calculated, (see text for detailed explanations). c). Ray paths and comparison of synthetics of SKS, SKPdS and SPdKS obtained by Generalized Ray Theory (GRT) and hybrid method for PREM (Preminiary Earth Reference Model).

The comparison of synthetics and observed waveforms for a Fiji event and the geometry of 3D partial melting structure.