Internal co-seismic deformation and curvature effect based on an analytical approach

作者：Jie Dong,Wenke Sun

摘要：In this study, we present a new method to compute internal co-seismic deformations of a homogeneous sphere, based on our previous approach(Dong et al.2016). In practical numerical computations, we consider a strike-slip point source as an example, and compute the vertical co-seismic displacement on different internal spherical surfaces(including the Earth surface). Numerical results show that the internal co-seismic deformations are generally larger than that on the Earth surface; especially,the maximum co-seismic displacement appears around the seismic source. The co-seismic displacements are opposite in sign for the areas over and beneath the position of the seismic source. The results also indicate that the curvature effect of the internal deformation is pretty large, and larger than that on the Earth surface. The results indicate that the dislocation theory for a sphere is necessary in computing internal co-seismic deformations.

发文机构：Key Laboratory of Computational Geodynamics

关键词：曲率效应同震形变解析法变形均匀性数值计算地震位移地球表面震源位置Internal displacement. Curvature effect. Spherical model

分类号： P315.725[天文地球—地震学][天文地球—固体地球物理学][天文地球—地球物理学]TN011[电子电信—物理电子学]