Characteristics of shear-wave splitting in the crust in Shanxi region
Zhang Ling
Li Zihong
Yan Minzheng
Dong Chunli
Zhang Hui
LRui
Abstract：Based on the analysis of seismic waveform data recorded by the Shanxi Digital Seismic Network from June 2000 to December 2012,the dominant polar-ization directions of fast shear-waves at 18 stations are obtained by use of the systematic analysis method (SAM)of shear-wave splitting in this study.The results show that for the stations located on active faults,the dominant polari-zation directions of fast shear-waves are mainly consistent with the strike of active faults;for individual stations further away from active faults,the domi-nant polarization directions are completely consistent with focal mechanism so-lutions and directions of regional principal compressive strains inferred from GPS data.While for a few stations located at the junction of several faults,the polarization of fast shear-wave is inconsistent with both the strike of active faults and the direction of principal compressive strain from GPS,indicating that faulting background and distribution characteristics of regional stress field are complex in Shanxi region.
Keywords：Shanxi regionfast shear-wavepolarizationprincipal compressive stressactive fault
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 559-570 )