剪切波分裂方法及其应用研究进展

Shear Wave Splitting Method and Its Recent Development in Appli￣ca￣tion

摘要:

剪切波分裂作为地震各向异性研究的重要方法之一,已经在地震研究领域得到广泛应用。不同震相的剪切波携带了不同深度介质的各向异性信息,通过剪切波分裂研究可以获得相对应的地震各向异性特征。本文系统介绍了剪切波分裂的理论基础以及近震、远震分析方法,总结了近年来剪切波分裂在研究地壳应力场、地震应力监测、地球深部构造等方面的相关成果,展望了该方法在地球科学领域的发展方向。本文旨在让读者较为全面地了解剪切波分裂方法及其在地球科学中的应用,为地震各向异性的研究提供参考与指导。

Abstract:

Shear wave splitting,a key method for studying seismic anisotropy,is widely applied in seismic research. Different shear wave phases carry anisotropic information from various depths within the Earth. By analyzing shear wave splitting,the anisotropic characteristics of the medium can be inferred. This article provides a systematic introduction to the theoretical foundation of shear wave splitting,along with analysis methods for both local and distant earthquakes. It reviews recent advances in using shear wave splitting to investigate crustal stress fields in seismic source regions,seismic stress monitoring,deep Earth structures,and other related areas. The article also discusses future directions for the application of this method in geoscience. Through this review,readers will gain a comprehensive understanding of shear wave splitting and its significant applications in geoscience,providing valuable insights and guidance for further studies of seismic anisotropy.