北京市测震台网数字地震台站台基背景噪声分析  

Analysis on station background noise of digital seismic stations of Beijing Seismic Network

作　　者：侯颉[1,2] 余大新 叶庆东[1] 徐荟[2] 孟宪纲[1] 徐东卓[1] 张海春[3] Hou Jie;Yu Daxin;Ye Qingdong;Xu Hui;Meng Xiangang;Xu Dongzhuo;Zhang Haichun(The First Crust Monitoring and Application Center,China Earthquake Administration,Tianjin 300180,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Beijing Earthquake Agency,Beijing 100080,China)

机构地区：[1]中国地震局第一监测中心,中国天津300180 [2]中国地震局地球物理研究所,中国北京100081 [3]北京市地震局,中国北京100080

出　　处：《地震地磁观测与研究》2019年第4期102-107,共6页Seismological and Geomagnetic Observation and Research

基　　金：北京市地震监测台网规划设计项目

摘　　要：基于北京市测震台网连续三分量地震计波形数据,计算28个测震台站台基噪声,利用Welch方法计算噪声功率谱密度(PsD),进而计算地震台台基1—20 Hz地动噪声均方根值(RMs)和观测动态范围。结果表明,依照《地震台站观测环境技术要求》,北京市测震台网中有11个Ⅰ类台、9个Ⅱ类台、6个Ⅲ类台、2个Ⅳ类台。通过分析北京市测震台网数字地震台背景噪声水平,为测震台网的规划建设提供数据支持。In this paper,basing the continuous waveform data of three-component seismometers of Beijing Seismic Network,the station base noise of 28 digital seismic stations in Beijing has been calculated,where the Welch method is used to calculate the noise power spectral density(PSD).And then the PSD is used to calculate the root mean square(RMS)and the observed dynamic range of the 1-20 Hz ground motion noise of the seismic platform.The results show that there are 11 stations of ClassⅠ,9 stations of ClassⅡ,6 stations of ClassⅢand 2 stations of ClassⅣaccording to“Technical Requirements for Observation Environment of Seismic Stations”.It provides data support for the planning and construction of Beijing Seismic Network by analyzing the background noise level of the digital seismic stations.

关 键 词：北京测震台网 数字台站 噪声功率谱 

分 类 号：P31[天文地球—固体地球物理学]