华东地区SKS波分裂研究

Abstract

Abstract: SKS wave splitting measurement is a powerful tool to characterize seismic anisotropy. We have made measurements of SKS wave splitting beneath the east China mainland. We use the technique of minimum energy to determine SKS wave splitting parameters at 157 three-component broadband regional digital stations in East China regions. The results indicate that fast-wave polarization direction for anisotropy is basically in the NW-SE direction in east China and nearly E-W direction in the south, which gradually rotates and is the same with the absolute plate movement direction. The anisotropy is mainly caused by the upper mantle and rarely occasioned by the crust and the sediments. In the study area, the substance movement pattern between the shallow and deep is basically the same and the deformation model of the crust and the mantle possibly experiences vertically coherent deformation.

Key words: SKS wave splitting, Anisotropy, East China

CLC Number:

P315

SHI Yu-yan, ZHENG Si-hua, YAN Qi, MIAO Qin-jie QU Jun-hao, DONG Xiang. SKS Wave Splitting in East China[J]. EARTHQUAKE, 2012, 32(4): 33-43.

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SKS Wave Splitting in East China

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