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

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.