【摘要】 汇集了１９９５年９月２０日山东苍山５．２级地震前安徽省所属各观测项目记录到的地震前兆数据变化，并初步分析了震前难以做出预报的原因更多还原

【Abstract】 The precursor data before earthquake of M S5.2 of Cangshan, Shandong, recorded by the observational manners of seismological stations of Anhui Province, and the cause is analysised preliminarily that it is difficult to predict the earthquake.更多还原