2018年7月会昌地震台洞体应变观测异常分析  

Anomaly analysis of strain observation at Huichang Seismic Station in July 2018

作　　者：谢斌 赵爱平 肖孟仁 刘宽 邓月圆 余志成 查小惠 冯亮 钟智东 罗叶美 XIE Bin;ZHAO Aiping;XIAO Mengren;LIU Kuan;DENG Yueyuan;YU Zhicheng;ZHA Xiaohui;FENG Liang;ZHONG Zhidong;LUO Yemei(Ganzhou Earthquake Monitoring Center Station,Jiangxi Province 341000,China;Jiangxi Earthquake Agency,Nanchang 330096,China;Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]赣州地震监测中心站,江西341000 [2]江西省地震局,南昌330096 [3]江西理工大学,赣州341000

出　　处：《地震地磁观测与研究》2025年第1期115-121,共7页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局监测、预报、科研三结合课题(项目编号:3JH-202401050);国家自然科学基金(项目编号:4210071309);江西省地震局“2111”孵化基金(项目编号:FD2111-202404)。

摘　　要：2018年7月13日至20日,会昌地震台洞体应变测项,即SS-Y型伸缩仪NS分量出现趋势转折,呈拉张上升变化,最大幅度约9.7×10^(-7)(相当于35倍日变幅度),与台站往年6月初的年度低点相比较存在显著差异。从观测系统、气象因素、环境干扰等方面展开分析,并结合台站其他测项进行对比分析,认为此次异常可能是2次不同来源的环境干扰异常叠加所致,基本可以排除地壳构造运动的影响,地震地球物理异常的可能性较小。From July 13 to 20,2018,the observation of the cave strain measurement item at the Huichang Seismic Station,that is,the NS component of the SS-Y type extensometer instrument,showed a trend turn and a tensile rise change,with the maximum amplitude of about 9.7×10^(-7)(equivalent to 35 times the diurnal variation amplitude),which was significantly different from the annual low point of the station in early June.From the observation system,meteorological factors,environmental interference,and other aspects,combined with other measurements of the station to carry out a comparative analysis,it is concluded that the anomaly may be caused by the superposition of two environmental interference anomalies from different sources,which can exclude the influence of crustal tectonic movement and the possibility of seismic geophysical anomalies are small.

关 键 词：洞体应变 伸缩仪 抽水实验 潮湿 环境干扰 

分 类 号：P315.7[天文地球—地震学]