同址观测洞体倾斜仪器背景噪声对比  

Comparison of Background Noise of Various Tiltmeters at the Same Site

作　　者：王嘉琦 周剑青 王曰风 袁国旭 常玉柱 WANG Jiaqi;ZHOU Jianqing;WANG Yuefeng;YUAN Guoxu;CHANG Yuzhu(Chengde Seismic Station of Hebei Earthquake Agency,Chengde 067000,China;Zhangjiakou Seismic Station of Hebei Earthquake Agency,Zhangjiakou 075000,China)

机构地区：[1]承德地震监测中心站,河北承德067000 [2]张家口地震监测中心站,河北张家口075000

出　　处：《华北地震科学》2023年第2期90-97,共8页North China Earthquake Sciences

基　　金：中国地震局监测、预测、科研三结合课题(CEA-JC/3JH-202201047)。

摘　　要：通过功率谱密度法对崇礼台垂直摆、水平摆、水管仪3类倾斜仪正常动态及震扰、风扰、气压干扰时段观测数据进行分析,结果表明:①各类倾斜仪能够较为清晰地记录到稳定的背景噪声;②地震波会导致各类倾斜仪当日变化相应时段的背景噪声增大,且背景噪声增大幅度与地震震级成正比,随震级的增大,产生影响的频段范围也会相应增大;③风扰主要影响0.15~0.3 Hz频段范围,气压干扰主要影响低频部分。The normal dynamic state of vertical pendulum,horizontal pendulum and water pipe tiltmeter in Chongli station,as well as the observation data of seismic disturbance,wind disturbance and pressure disturbance are analyzed by the power spectral density method,the results show that:1)The three kinds of tiltmeters can record the stable background noise relatively clearly.2)In the corresponding time period,the seismic waves increase the background noise,and the increase of background noise is proportional to the magnitude of the earthquake.With the increase of magnitude,the influence of the frequency range also increase correspondingly.3)Wind disturbance mainly affects the 0.15~0.3 Hz frequency range,and pressure disturbance mainly affects the low frequency part.

关 键 词：形变观测 功率谱密度 背景噪声 地震震级 

分 类 号：P315.7[天文地球—地震学]