一、前言寻求识别前震的标志,是地震予报工作中值得探索的问题。但是目前还没有找到判断一个小震是否属于某一大地震的前震的肯定标志。地震是一个极复杂的力学过程,当裂纹稳态扩展突变到非稳态扩展的过程中,介质从连续状态过渡到非连续状态,形变的分布是极为不 I. Introduction The preface to seek identification of foreshocks is an issue worth exploring in earthquakes reporting. However, no positive signs have been found to determine whether a minor earthquake belongs to a foreshock of a major earthquake. Earthquake is a very complex mechanical process. When the steady-state propagation of a crack changes into a non-steady state, the medium transitions from a continuous state to a discontinuous state. The deformation distribution is extremely not