摘要
利用最大嫡谱和博氏分析方法分析了大同地震地下水群体异常的周期特征。结果表明．地下水群体异常存在着一系列的周期成分．其中4个月的周期成分显著，分波的振幅在大震前发生畸变。对这些现象的认识，将有助于识别异常的性质（有震，无震）．揭示异常与地震的复杂对应关系。对正确的震情分析判断和地震预报具有重要的实用意义。
In this paper, we have analysed the periodicity of underground water grouped anomalies before andafter the Datong earthquake by maximum entropy spectrum and Fourier method. The results showedthat the underground water grouped anomalies have a series of periodicities, and the four month periodicity is obvious, the amplitude of the subwave is distorted before strong earthquakes. By using themethod we may judge the anomaly nanture (as earthquake, no earthquake), and judge the complex relation of the anomaly to the eathquake, proved that the method has important practical sense to judgeearthquake situation and predict earthquake.
出处
《华北地震科学》
1997年第4期42-45,共4页
North China Earthquake Sciences
