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常熟地震(M_S5.1)的前兆分布及其力学联系

PRECURSORY DISTRIBUTION OF CHANGSHU EARTHQUAKE WITH M_S5.1 AND ITS MECHANICAL CORRELATION
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摘要 本文分析讨论了1990年2月10日常熟M_S5.1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呼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。 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.
机构地区 江苏省地震局
出处 《地震》 CSCD 北大核心 1994年第3期72-77,共6页 Earthquake
关键词 地震 前兆分布 力学联系 地震前兆 Changshu earthquake anomaly precursory regionalization mechanical correlation comprehensive analysis
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