地震是大地构造运动的一种方式,它也和大地构造运动其它方式一样,取决于在发展历史过程中力作用的大小、方向和速度以及介质(岩石)的形态、成分和结构的不均一性。岩石的不均一的地方,就是应力容易集中和释放的地方,也就是容易变形的地方。因此研究岩石的不均一性,是研究地震形成的物质基础。 Earthquakes are a form of tectonic movement of the earth and, like other forms of tectonic movement in the earth, depend on the magnitude, direction and speed of the forces acting during the course of development and on the shape, composition and structural heterogeneity of the medium (rock) . Inhomogeneous rock, where stress is easy to concentrate and release, that is, easily deformed place. Therefore, studying the heterogeneity of rocks is the material basis for the study of earthquake formation.