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利用山东省每年地震会商报告给出的地震前兆异常（不是取地震后的震例总结或论文给出的异常），按“专家系统”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震时间来估算发震概率，计算了各类地震前兆异常群体信息熵，研究了苍山ＭＳ５．２ 地震前综合信息熵的变化特征。结果表明：震前熵值减少，系统向有序方向发展
Based on the earthquake precursory anomaly (not the sum of earthquakes or the anomalies given in the dissertation) given by the Annual Earthquake Business Report of Shandong Province, a comprehensive assessment of each anomalous earthquake anomaly is made according to the “expert system” Anomalous probability of occurrence of seismogenic event is used to estimate the probability of seismogenic event. The information entropy of various types of earthquake precursory anomalies is calculated and the characteristics of comprehensive information entropy before Cangshan MS5.2 earthquake are studied. The results show that the pre-earthquake entropy decreases and the system develops in an orderly direction