地震地磁观测与研究2025，Vol.46Issue(3)：135-141,7.DOI:10.3969/j.issn.1003-3246.2025.03.017
运城地区预警基准站背景噪声特征分析
Analysis of background noise characteristics of early warning reference stations in Yuncheng
摘要
Abstract
Using the acceleration power spectral density(PSD)and power spectral probability density function(PDF)methods,we calculated the background-noise levels at the eight early warning reference stations in Yuncheng.The results indicate that:① The background noise of the 8 early warning reference stations in the region is affected by human production activities in the high-frequency range.Compared with the observation on ground,the installation in caves and underground can significantly reduce man-made noise interference.② The PSD and PDF calculation results of the background noise recorded by the seismometers and accelerometers installed on the same pedestal are generally consistent in the high-frequency range above 2 Hz,while that shows significant differences in the frequency range below 2 Hz;③ The PDF calculation results of seismometer recorded data are relatively concentrated in the frequency range of 10 s—10 Hz,and the distribution characteristics of each station are slightly different;The PDF calculation results of accelerometer recorded data are relatively concentrated across the entire frequency band,and through comparison,it is found that stations with less human activity interference have a relatively concentrated distribution of PDF values.关键词
预警基准站/背景噪声/人为噪声/PDFKey words
early warning reference station/background noise/man-made noise/PDF引用本文复制引用
李晓锐,郭延杰,刘国俊,叶阔..运城地区预警基准站背景噪声特征分析[J].地震地磁观测与研究,2025,46(3):135-141,7.基金项目
山西省地震局一般项目"山西南部预警台站台基噪声及场地响应分析"(项目编号:SBK-2414) （项目编号:SBK-2414）
