Detailed crustal structure in Shanghai Seismic Array
In this paper,the teleseismic waveform data recorded at 16 sub-stations of the Sheshan Seismic Array in Shanghai are selected,and the time-domain deconvolution method is used to calculate the P-wave receiver functions at different frequencies,and the H-κ stacking method is used to obtain the thickness of the crust beneath each sub-station and the vP/vS ratio.The results show that there are weak lateral inhomogeneities in crustal thickness and vP/vS ratio beneath the whole array,with the average Moho surface depth in the Sheshan region of Shanghai being thin,about 26.9 km,and the vP/vS ratio being high,about 1.87.The inversion of the S-wave velocity structure of the crust beneath the Sheshan Seismic Array is performed by using the least-square method in combination with the multi-frequency P-wave receiver functions and Rayleigh dispersion curves,and the results show that there is an S-wave low-velocity structure in the middle crust,which is consistent with the results of previous studies.
万方数据
维普
