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.
作者
侯颉
余大新
叶庆东
徐荟
孟宪纲
徐东卓
张海春
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)
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
关键词
北京测震台网
数字台站
噪声功率谱
Beijing Seismic Network
digital seismic station
noise power spectrum
