新冠疫情防控措施对河北台网地震台背景噪声影响  

Influence of COVID-19 Prevention and Control Measures on Background Noise of Seismic Stations of Hebei Network

作　　者：王宁 毛国良[1,2] 尹康达 王莉婵[1,2] 王亚玲 刘丽[1,2] 郭蕾 WANG Ning;MAO Guoliang;YIN Kangda;WANG Lichan;WANG Yaling;LIU Li;GUO Lei(Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Xingtai 05400,China;Hebei Earthquake Agency,Shijiazhuang 050021,China)

机构地区：[1]河北红山巨厚沉积与地震灾害国家野外科学观测研究站,河北邢台054000 [2]河北省地震局,石家庄050021

出　　处：《华北地震科学》2022年第4期77-82,共6页North China Earthquake Sciences

基　　金：中国地震局震情跟踪定向任务(2022010501)。

摘　　要：选取河北台网谈固台、张家口台、丰宁台2020年1月20日到2月10日新冠疫情期间连续波形数据,计算其背景噪声功率谱密度值,分析1~20 Hz高频段背景噪声值随时间的变化。结果显示,3个地震台在疫情发生期间,2~16 Hz高频段功率谱值出现下降,局部日幅值变化达到10 dB,均值在2~5 dB之间。背景噪声与人类活动之间的密切关系可以为监测城市公共管理水平提供重要参考。This paper selects the continuous waveform data of Tangu station,Zhangjiakou station and Fengning station of Hebei station network from January 20 to February 10,2020,calculates the background noise power spectral density value,and analyzes the change of background noise value with time in the high frequency band of 1~20 Hz.The results showed that during the epidemic period,the power spectrum value of 2~16 Hz high frequency band decreased,and the local daily amplitude variation reached 10 dB,with an average value of 2~5 dB.The close relationship between background noise and human activities can provide a reference for monitoring the level of urban public management.

关 键 词：背景噪声 新冠疫情 人类活动 功率谱密度 

分 类 号：P315.63[天文地球—地震学]