山西陵川台钻孔应变降雨干扰特征定量分析  

Quantitative Analysis of Borehole Strain Rainfall Disturbance Characteristics at Lingchuan Station,Shanxi

作　　者：魏凯艳 陈慧 李颖[1,3] 李惠玲[2,3] 陈永前 WEI Kaiyan;CHEN Hui;LI Ying;LI Huiling;CHEN Yongqian(Shanxi Earthquake Agency,Taiyuan,Shanxi 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan,Shanxi 030025,China;Yuncheng Earthquake Monitoring Center Station of Shanxi Earthquake Agency,Xia County,Shanxi 044400,China)

机构地区：[1]山西省地震局,山西太原030021 [2]山西省地震局运城地震监测中心站,山西夏县044400 [3]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2024年第4期27-32,共6页Earthquake Research in Shanxi

基　　金：山西省地震局科研项目(SBK-2408);中国地震局监测、预报、科研三结合课题(3JH-202401010);震情跟踪定向工作任务(2024010216)。

摘　　要：以陵川台钻孔应变资料为基础,基于数据跟踪分析平台,系统分析资料并提取降雨事件,采用形变观测值和形变变幅分别对降雨量做相关分析,并挑选相关系数较高的结果建立回归模型,定量分析降雨对观测数据产生的影响。结果表明,形变变幅与降雨量之间的相关系数较高,拟合程度最高是一元三次函数。当陵川四分量降水量约10 mm以上时,应变量发生相应变化,降雨的累积值约为40 mm时,观测值趋于稳定不再受到影响。研究结果可为定量分析降雨干扰积累经验。To determine earthquake precursor anomalies in a timely and effective manner and improve the role of four-component borehole strain observation data in earthquake short-term tracking,the borehole strain data at Lingchuan station was used as the basis to systematically analyze the data and extract rainfall events,and the observed deformation value and deformation amplitude were used for correlation analysis with rainfall respectively.The results with high correlation coefficient were selected to establish a regression model to quantitatively analyze the influence of rainfall on the observed data.The results show that the correlation coefficient between the deformation amplitude and rainfall is higher,and the highest degree of fitting is a cubic function of one yuan.When the precipitation of the four components of Lingchuan is about 10 mm or more,the dependent variable changes correspondingly,and when the cumulative value of rainfall is about 40 mm,the observed value tends to be stable and no longer affected.The research results accumulate experience for the quantitative analysis of rainfall interference.

关 键 词：降雨干扰 异常识别 钻孔应变 定量分析 

分 类 号：P315.72[天文地球—地震学]