运城东郭流体观测井震兆特征及映震灵敏性分析  

Analysis on precursor characteristics and reflecting earthquake sensitivity of Dongguo fluid observation well,Yuncheng

作　　者：张淑亮[1,2] 李斌[1,2] 李天骄[3] 吕芳[1,2] 刘国俊[1,2] 黄春玲[1,2] 

机构地区：[1]山西省地震局,中国太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,中国山西030021 [3]东华理工大学,中国江西344100

出　　处：《地震地磁观测与研究》2011年第2期53-59,共7页Seismological and Geomagnetic Observation and Research

基　　金：山西省科技攻关项目(2006031106);地震科学联合基金(A08051);震情跟踪合同制项目(2010010102)

摘　　要：对东郭流体观测井在山西地震带几次4级以上地震前的异常特征及映震灵敏性进行分析,认为震前多以短临异常为主,异常持续时间具有随震级增大而增加的特点;异常形态水位以突降为主,水温则以突升为主,异常幅度表现为随震级增大而增大、随震中距减小而增大的特点;除汶川地震外,东郭井水位、水温所对应的地震均发生在山西地震带上;东郭流体观测井以其特有的不变径成井工艺、特殊的构造部位(中条山北缘活动带)等优势条件,对山西地震带地壳应力应变等微动态信息具有较灵敏的响应。Anomalous characteristics and reflecting earthquake sensitivity of Dongguo fluid observation well, Yuncheng before several earthquakes with magnitude around M 4 in Shanxi seis- mic zone have been analyzed in this paper. The results indicate that anomalies before earthquakes are main short-impending anomalies, and the lasting time of anomalies increases as increase in earthquake magnitudes. The anomaly shapes of water level are mainly abrupt fall, while water temperature is mainly sudden increase. Meanwhile, anomalous amplitudes show larger and larger as increase in earthquake magnitudes and decrease in epicenter dis- tance. Beside Wenchuan earthquake, all earthquakes corresponded by anomalies of Dongguo well water level and temperature have occurred in Shanxi seismic zone. The unique invariable diameter well-forming techniques, special tectonic position （active belt of Zhongtiaoshan north edge） and other advantaged conditions, make Dongguo fluid observation well to be more sensitive to variation in crustal stress strain of Shanxi seismic zone.

关 键 词：流体观测井 震兆特征 映震灵敏性 

分 类 号：P315.72[天文地球—地震学]