For this purpose, the Maslov asymptotic ray theory of the receiver functions in the 3 D laterally inhomogeneous media (Chen and Liu, 1999) is used for computing the synthetic receiver functions, when dipping interfaces exist under a single station.

Based on the results of 3-D velocity pattern,seismic sounding in Yunnan and quantitatively correcting transverse inhomogeneity,we have calculated the basic source parameters of Yaoan M5.

On the basis of correctly describing the physical conception of sedimentary press,the paper first de-duced motion equation in bi-component composite uneven medium and further deduced displacement motion equation in exploration seismology and development seismology on that basis.