论文部分内容阅读
介绍了利用反射波走时反演介质层速度和包含直立断层的三维界面的计算方法．对各层界面利用多个倾斜或平界面方程来描述．给出了数值计算实例．结果表明，反演解与真模型很接近，说明计算方法是有效的．利用该方法处理了唐山地震区的ＰｍＰ反射波资料，获得了该区域莫霍界面的三维分块形态．唐山附近莫霍界面错断与该区域１９７６年唐山地震及一系列余震的发生有密切的联系．
The method to calculate the 3D velocity of the medium and the upright fault by means of reflected wave travel time is introduced. The interface of each layer is described by using multiple inclined or flat interface equations. A numerical example is given. The results show that the inversion solution is very close to the true model, indicating that the calculation method is effective. Using this method, the PmP reflection wave data of Tangshan earthquake area was processed and the three-dimensional block morphology of the Moho interface was obtained. The fault of Moho near Tangshan is closely related to the 1976 Tangshan earthquake and a series of aftershocks in this area.