地震是十分复杂、非均匀、非线性的三维系统内破裂过程的结果。在一定条件下,地震数字时间序列可以看作某种随机过程。通过对大量数据的观测和分析,从而提取出有规律的地震信息。地震过程的周期现象是随机性的,不能用单一的谐波曲线来表示,而是 Earthquakes are the result of a very complex, non-uniform, nonlinear three-dimensional system of rupture. Under certain conditions, the seismic digital time series can be regarded as some stochastic process. Through the observation and analysis of large amounts of data, we can extract regular seismic information. The periodic phenomenon of the earthquake process is random and can not be represented by a single harmonic curve. Instead,