本文收集和整理了唐山地区地震前后的水平形变资料。为了削弱由起算数据误差引起的形变网偏扭,用相似变换法对资料进行了再处理,获得了较满意的结果。 文中讨论了震前、震时及震后的地壳水平形变特征以及其所反映的应变状态、构造运动和力学机制。指出地壳在地震的全过程中不仅呈现弹性而且有明显的塑性和粘性。 This paper collects and organizes the horizontal deformation data before and after the earthquake in Tangshan area. In order to weaken the deflection of the deformation network caused by the initial data error, the data were processed by the similar transformation method, and the satisfactory result was obtained. In the paper, the crustal horizontal deformation before earthquakes, earthquakes and earthquakes are discussed, as well as the state of their reflection, tectonic movement and mechanical mechanism. It is pointed out that the crust is not only elastic but also obviously ductile and viscous during the entire earthquake.