福建古田水口库区M_L4.8震群分析与水库诱发地震探讨
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摘要
阐述了水口库区及邻近地区的地震地质构造特征和库区蓄水前后的地震活动变化特点。重点分析了水库蓄水以来发生的最大地震——古田ML4.8地震序列,并对库区地质与水文环境条件、诱发地震成因、机理等进行了研究。结果表明:水口库区地震与水库蓄水有直接关系,诱发地震震中主要集中在古田县水口镇湾口—前洋一带,范围约13km2。库区地震活动还将持续较长时间,且库区水位的升降与地震之间的相关性将越来越弱。最后对水口库区地震预测方法和最大震级进行了阐述。
We expatiate the geological structure of Shuikou reservoir and its vicinage and the seismicity fore-and-aft sluice.We analyze Gutian ML4.8 earthquake,the maximum earthquake occurred in Shuikou reservoir area,then analyze the geological structure and the hydrological environment of Shuikou reservoir and the mechanism of reservoir-induced earthquake.The result shows that the earthquakes occurred in Shuikou reservoir are correlated with sluiced,and most epicenters concentrated in Wankou-Qianyang zone,Shuikou Town,Gutian County.The area is about 13 square kilometers.The activity of earthquake of Shuikou reservoir will keep long time,and the correlation between the rise and fall of water line of Shuikou reservoir and the occurrence of earthquake.Finally we discuss the method of forecasting the reservoir-induced earthquake and the maximal class earthquake of Shuikou reservoir.
We expatiate the geological structure of Shuikou reservoir and its vicinage and the seismicity fore-and-aft sluice.We analyze Gutian ML4.8 earthquake,the maximum earthquake occurred in Shuikou reservoir area,then analyze the geological structure and the hydrological environment of Shuikou reservoir and the mechanism of reservoir-induced earthquake.The result shows that the earthquakes occurred in Shuikou reservoir are correlated with sluiced,and most epicenters concentrated in Wankou-Qianyang zone,Shuikou Town,Gutian County.The area is about 13 square kilometers.The activity of earthquake of Shuikou reservoir will keep long time,and the correlation between the rise and fall of water line of Shuikou reservoir and the occurrence of earthquake.Finally we discuss the method of forecasting the reservoir-induced earthquake and the maximal class earthquake of Shuikou reservoir.
引文
胡毓良.1979.我国水库地震及有关成因问题的讨论[J].地震地质,1(4):43-57.
李志祥,毛玉平,谢建斌,等.云南景洪电站水库库区断层与地震危险性分析[J].地震研究,28(2):174-179.
林松建,黄昭,连玉平,等.2007a.水口水库诱发地震特征与发震断裂的探讨[J],大地测量与地球动力学,27(1):40-44.
林松建,连玉平,陈为伟.2007b.水口水库地区地震震源机制解特征分析[J].地震,27(1):114-119.
毛玉平,王洋龙,李朝才.2004.小湾库区水库诱发地震的地质环境分析[J].地震研究,27(4):339-343.
彭美凤,林世敏,林松建.1997.水口水库地震及其活动特征[J].华南地震,17(2):83-89.
许振栋.2004.福建水口水库诱发地震最大震级预测[J].地震地磁观测与研究,25(3):58-62.
许振栋,陈传昌.2004.水口水库诱发地震研究[J].大地测量与地球动力学,24(2):58-63.
张林洪,刘荣佩,周建芬,等.2002.构造型水库地震的断裂力学分析[J].地震研究,25(2):186-191.
张林洪,刘荣佩,周建芬,等.2004.库水压力作用下不同类型断层诱发水库地震的可能性分析[J].地震研究,27(3):241-245.
李志祥,毛玉平,谢建斌,等.云南景洪电站水库库区断层与地震危险性分析[J].地震研究,28(2):174-179.
林松建,黄昭,连玉平,等.2007a.水口水库诱发地震特征与发震断裂的探讨[J],大地测量与地球动力学,27(1):40-44.
林松建,连玉平,陈为伟.2007b.水口水库地区地震震源机制解特征分析[J].地震,27(1):114-119.
毛玉平,王洋龙,李朝才.2004.小湾库区水库诱发地震的地质环境分析[J].地震研究,27(4):339-343.
彭美凤,林世敏,林松建.1997.水口水库地震及其活动特征[J].华南地震,17(2):83-89.
许振栋.2004.福建水口水库诱发地震最大震级预测[J].地震地磁观测与研究,25(3):58-62.
许振栋,陈传昌.2004.水口水库诱发地震研究[J].大地测量与地球动力学,24(2):58-63.
张林洪,刘荣佩,周建芬,等.2002.构造型水库地震的断裂力学分析[J].地震研究,25(2):186-191.
张林洪,刘荣佩,周建芬,等.2004.库水压力作用下不同类型断层诱发水库地震的可能性分析[J].地震研究,27(3):241-245.
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