固体潮潮汐因子的特征频谱及其应用

CHARACTERISTIC SPECTRUM OF TIDAL FACTOR AND ITS APPLICATION

本文应用非线性谱分析中的最大熵谱分析方法（ＭＥＭ）、和一般线性功率谱的分析方法，对固体潮潮汐因子的时间序列进行了综合研究，指出固体潮潮汐因子的时间序列中普遍存在明显的半月左右周期的特征频谱；将其应用于地震前兆的分析与探索，对固体潮潮汐因子特征频谱中的前兆变化特征进行了解释，得出结论：半月左右周期的频率域，是固体潮观测中前兆响应的一个重要主频域。

In this paper,the time series of tidal factor is synthetically studied by maximum entropy method (MEM) of non-linear spectrum analysis and a method of linear power spectrum analysis. It shows that the changes of the tidal factor time series contain obvious characteristic spectrum of half-monthly period. By use of it for earthquake precursor analysis,the features of precursory change of the tidal factor characteristic spectrum are explained and we draw a conclusion that the half-monthly frequency range is an important main frequency of precursory response of the earth tide.