常熟地震（Ms5.1）的前兆分布及其力学联系

本文分析讨论了１９９０年２月１０日常熟ＭＳ５．１地震前地电阻率、短水准、地应力、地倾斜、地下水等前兆异常现象的力学联系；建立了北西向压扭性断裂前兆分区模型，反映在不同区域里各种前兆均有其一定的表现特征，说明以力学联系为纽带，前兆异常时间与空间分布的咱应性是地震中期预测的一项重要指标，同时表明综合分析识别异常的必要性。

PRECURSORY DISTRIBUTION OF CHANGSHU EARTHQUAKE WITH M_S5.1 AND ITS MECHANICAL CORRELATION

This paper analyzed the mechanical correlation of some precursors occurred be -fore Changshu earthquake with MS5.1 on Feb. 10,1990; those precursors are earth resis -tivity, short levelling, earth stress, earth tilting and ground water etc. The precursory regionalized model of NW-striking compression-shearing faulting is established, re -fleeting that there is a certain expressional feature of all precursors occurred in diffe -rent regions. It is suggested that the correspondence of the temporal and spatial distri -bution of precursory anomalies is an important criterion for the medium-term earth quake prediction based on their mechanical correlation. At same time, it also indicates the necessity to recognize the anomalies by the comprehensive analysis.