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首先介绍了使用的地震活动动态参数，其中3个参数（频度N、重复率曲线斜率γ、假想应变）与构造应力水平有关，2个参数（系数μ、逆断层地震数与地震总数之比N逆／N总）与作用力特征有关，2个参数（Vp／Vs、波速比异常数与总数之比N异／N总）与介质状态有关，一个参数（莫里希特指数Iδ）与地震活动的空间结构有关。随后将地震带划分成小区，分析了上述参数的时间序列特征，指出前兆呈现的时间随震中距增大而减小。提出了强震孕育的4个基本阶段：背景阶段、雪崩阶段、平静阶段和破裂阶段。简要分析了上述参数在各阶段的变化特征。
Firstly, the dynamic parameters of seismic activity are introduced. Among them, three parameters (frequency N, slope of repetition rate curve γ and imaginary strain) are related to tectonic stress level. Two parameters (coefficient μ, ratio of seismic number of reverse fault to total number of earthquakes N inverse / N total) is related to the force characteristics. The two parameters (Vp / Vs, the ratio of the anomaly of wave speed ratio to the total number of N / N total) are related to the state of the medium. A parameter Seismic activity related to the spatial structure. Then the seismic zone is divided into small areas, and the time series features of the above parameters are analyzed. It is shown that the time of the precursors decreases with the increase of the epicenter distance. Four basic stages of strong earthquake are proposed: background stage, avalanche stage, calm stage and rupture stage. The characteristics of the above parameters in each stage are briefly analyzed.