地震是一种地质现象,也是地壳运动的一种表现形式。强烈地震往往是地壳运动急剧的表现形式之一。地震的孕育、发生和发展过程,实质是地应力积累、降低和释放过程的一种表现,是该区地应力状态超过岩石强度,产生破坏的结果。它的发生,经常以机械能的形式释放,才能够发起震动,降低能量,使震源区应力不再那么集中,经过地应力场 Earthquake is a geological phenomenon, but also a manifestation of crustal movement. A strong earthquake is often one of the sharp manifestations of the crustal movement. The occurrence, development and development of earthquakes in nature are just a manifestation of the process of accumulation, reduction and release of earth stress, which is the result of the state of over-stress in the area exceeding the strength of the rock and causing damage. Its occurrence, often in the form of mechanical energy release, can initiate vibration, reduce energy, so that the focal area stress is not so concentrated, after the stress field