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分析了１９９５年９月２０日山东苍山５２级地震前，距震中≤２５０ｋｍ范围内，钻孔应力应变台网的异常显示特征。探讨了该次地震前的短临异常特性及其与发震构造体系的关系，并对台网内无异常显示的台站进行客观分析
The anomalous characteristics of borehole stress-strain network before and after the MS 5.2 Wenchuan Earthquake on September 20, 1995 were analyzed. Discussed the short-term anomalous characteristics before the earthquake and its relationship with the seismogenic structure system, and conducted an objective analysis of stations without abnormalities in the network