河北无极井同震响应特征分析  

Co-seismic response characteristics of Wuji well in Hebei Province

作　　者：董博[1] 纪春玲[1] 周安聘 张环曦[1] 赵雨晨 李凤[1] 章阳 王时 DONG Bo;JI Chunling;ZHOU Anpin;ZHANG Huanxi;ZHAO Yuchen;LI Feng;ZHANG Yang;WANG Shi(Shijiazhuang Central Station, Hebei Earthquake Agency, Shijiazhuang 050021, Hebei, China)

机构地区：[1]河北省地震局石家庄中心台,河北石家庄050021

出　　处：《地震工程学报》2021年第5期1077-1086,共10页China Earthquake Engineering Journal

基　　金：中国地震局专项“全国地球物理台网数据跟踪分析与产出”。

摘　　要：小波变换得到河北无极井水位震前异常明显,异常一般出现在震前3个月内,对2011—2018年河北无极井数字水位分钟值数据及全球M≥5.0地震资料进行分析,结果表明:无极井对全球M≥7.0地震具有较好的同震响应能力,对不同地震的响应形态均表现为震荡型的水震波;井-含水层观测系统、地震震级、井震距是影响水震波记录效果的重要因素;震源机制类型可能会影响井孔记录水震波的效果。对水震波与地震波关系进一步分析表明:引起水位同震响应的地震波中R波引发的水位变化幅度最大;小波变换得出大震前水位细节分析存在明显的高频异常信息,震后效应明显。综合分析前人对水位震荡的机理研究,并结合无极井具体情况对其相关机理进行初步探讨。Obvious anomalies of Wuji well in Hebei Province,which generally occurred within 3 months before earthquakes,were obtained through the wavelet transform analysis in this paper.The minute data of digital water level of Wuji well and the global M≥5.0 seismic data from 2011 to 2018 were analyzed.The results showed that Wuji well has good co-seismic response ability to global M≥7.0 earthquakes,and the response forms to different earthquakes are oscillatory water-level seismic waves.Well-aquifer observation system,seismic magnitude,and well-hypocenter distance are important factors affecting the effect of water-level seismic wave recording.The type of focal mechanism may influence the effect of water-level seismic waves.A further analysis of the relationship between water-level seismic wave and seismic wave showed that R wave causes the largest change of water level.The wavelet transform results showed that there is obvious high-frequency abnormal information in the detailed analysis of water level before large earthquakes.In this paper,the previous research on the mechanism of water level oscillation was comprehensively analyzed,and the relevant mechanism was preliminarily discussed in combination with the specific situation of Wuji well.

关 键 词：同震响应 水位 小波变换 无极井 

分 类 号：P315[天文地球—地震学]