宁夏井水位记震能力变化与周边地震关系研究  

The Relationship between the Co-seismic Response Capability of Well Water Level and the Surrounding Earthquake

作　　者：崔瑾 司学芸 孙小龙 曾宪伟 丁风和 CUI Jin;SI Xue-yun;SUN Xiao-long;ZENG Xian-wei;DING Feng-he(Earthquake Administration of Ningxia,Yinchuan 750001,China;Institute of Crustal Dynamics of China Earthquake Administration,Beijing 100085,China)

机构地区：[1]宁夏地震局,宁夏银川750001 [2]应急管理部国家自然灾害防治研究院,北京100085

出　　处：《地震》2021年第3期131-143,共13页Earthquake

基　　金：地震科技星火计划公关项目(XH18053Y);宁夏地震科研基金课题(NX201902);宁夏地震局科技创新项目(CX2019-4);宁夏回族自治区重点研发计划一般项目(2018BEG03004)。

摘　　要：通过分析宁夏地区5口井水位记录的2013-2018年对中国大陆5级以上、全球7级以上地震的同震响应,计算了引起5口井水位同震响应地震震级与震中到观测井距离的阈值范围,即井水位记震范围及各观测井的记震特征,提出结合井水位记震范围与记震特征分析各井记震能力随时间变化的方法。结果表明,引起宁夏地区井水位同震响应的地震震级和井震距确实存在某个阈值范围关系,表示为地震能量密度,宁夏地区约为10^(-4) J·m^(-3);相较于以往判断井水位记震能力变化的方法,该方法提高了时间分辨率;当井水位记震能力发生变化时,井周边发生4.5以上地震的概率较高。We chose 5 wells in Ningxia and analyzed the co-seismic groundwater level responses to earthquakes that above 5.0 in China's Mainland and 7.0 in the world between 2013 to 2018.We summarized the characteristics of each well and got two points.One is the range of earthquake recorded by well water level,it means the threshold range of magnitude and distance causing co-seismic response of well water level.The other is coseismic characteristics of each observation well.Combining with these two points,we could get co-seismic response capability of well water level change over time.The data results show that there is a well water level co-seismic threshold range of earthquake magnitude and distance in Ningxia,and expressed by seismic energy density,it is about 10^(-4) J/m^(3).The method of combining the two points improves the time resolution,compared with the previous one,and when the water level co-seismic capacity changes,the probability of more than 4.5 earthquakes occurring in the vicinity of the well is higher.

关 键 词：同震响应 地震能量密度 记震能力 

分 类 号：P315.7[天文地球—地震学]