华南地震2024，Vol.44Issue(3)：137-145,9.DOI:10.13512/j.hndz.2024.03.15
广东地震预警网三类站环境地噪声水平评估
Assessment of Ambient Ground Noise Levels at Three Types of Stations of Guangdong Earthquake Early Warning Network
摘要
Abstract
Ambient ground noise calculations were performed for 71 reference stations,201 strong motion stations,and 900 intensity stations of Guangdong Earthquake Early Warning(EEW)Network.The overall assessment was favorable,meeting national observational standards.Specifically,noise levels from the seismic channels of the reference stations fell between NHNM and NLNM,significantly lower than the M1.5 amplitude spectrum models,with RMS values primarily in the order of magnitudes of 10-9-10-8 m/s.In addition,65 reference stations at level I were assessed as high-quality stations.The noise levels from strong seismic channels of the reference stations was generally lower than the M1.5,approaching NHNM,with RMS values primarily in the order of magnitudes of 10-7-10-6 m/s2.The noise levels of strong motion stations were generally lower than the M2.5,with RMS values primarily in the order of magnitudes of 10-6-10-5 m/s2.The noise levels of intensity stations were lower than the M3.5,with RMS values mainly in the order of magnitude of 10-4 m/s2.In most intensity stations,strong seismic channels of some reference stations,and a few strong motion stations,the ambient noise mainly reflects the inherent self-noise of intensity meters or accelerometers,which was meaningless for cross-correlation analysis of background noise.Additionally,the vertical component noise of intensity stations was significantly louder than the horizontal component noise(by approximately 0.5 times)due to the performance of intensity meters.关键词
地震预警/基准站/基本站/一般站/环境地噪声Key words
Earthquake early warning(EEW)/Reference station/Strong motion station/Intensity station/Ambient ground noise分类
天文与地球科学引用本文复制引用
陈建涛,叶世山,李晋恺,卢子晋,严兴,劳谦,丁莉莎,黄晖..广东地震预警网三类站环境地噪声水平评估[J].华南地震,2024,44(3):137-145,9.基金项目
广东省地震局青年地震科研基金(重点实验室开放基金)(GDDZZ202301) （重点实验室开放基金）
广东省地震局科研项目(GDDZJ202201)联合资助. （GDDZJ202201）
