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利用“专家系统”的思想对每一地震前兆异常事件进行综合评估，以每一异常的最可能发展时间来计算发震概率，利用各类地震前兆异常群体信息熵研究了系统熵值与地震场、源兆的关系。分析了1976年唐山7．8缓地震前各类地震前兆异常的时空分布特征，然后以唐山为中心在空间上划分三个区：近区、中间区和远区，分别计算了三个区各类地震前兆异常信息熵的时间演化值，分析了震前这种信息熵的场、源兆特征：震中近区的信息熵值要比中间区及远区低得多。
Using the idea of “expert system”, we comprehensively evaluate the anomalous events of every earthquake and calculate the probability of occurrence of anomaly based on the most probable development time of each anomaly. Based on the information entropy of various types of earthquake precursors, , The source of the relationship between trillion. The spatial and temporal distribution of precursory anomalies of various types of earthquakes before the gentle earthquakes of 1976 in Tangshan are analyzed. Then, three areas are divided into three areas: near area, middle area and far area. The three areas The temporal evolvement values of anomalous entropy of earthquake-like quasi-seismic data have analyzed the field and source truncation features of the information entropy before the earthquake: the entropy of the near-epicenter is much lower than that of the middle and far regions.