【摘要】 利用同震和震后变形模拟软件包,以我国唐山7.8级地震和伽师6.8级地震为例,在考虑和忽略重力两种条件下,分别采用弹性半空间均匀模型和分层模型,模拟和比较了同震地表水平与垂直形变的差异,结果发现模型分层和重力的影响非常显著,超过了可观测到的量级。表明在应用Okada模型分析类似震例时模型分层和重力的影响是不可忽略的。更多还原

【Abstract】 The co-seismic vertical and horizontal deformations for two earthquakes(Tangshan M7.8 earthquake in 1976,Jiashi M6.8 earthquake in 2003) in China are calculated by use of the two softwares for co-seismic and post-seismic deformation.The computations are implemented under the cases of taking into account/neglecting the gravitation with elastic homogeneous half-space/elastic layered half-space earth model respectively. The results show that the influences of earth’s stratification and gravity on the co-seismic deformation greatly exceed the resolution of modern observation techniques. It indicates the influences of earth’s stratification and gravity cann’t be ignored in analyzing the similar earthquakes with the Okada’s model.更多还原