摘要
应用PDF方法,计算了内蒙古现运行48个测震台站0.01~20 Hz频带范围内的功率谱密度(PSD)和1~20 Hz频带范围内噪声均方根(RMS)值,定量分析了内蒙古区域背景噪声水平。结果显示:平均噪声水平属于Ⅰ类的台站有45个,Ⅱ类有3个;台站背景噪声在1 Hz以上频段内,主要受公路和人为影响;在0.6~1 Hz频段内背景噪声水平差异较小;在低频段,水平向受温度和湿度影响大于垂直向,山洞台受影响小于地面台。
In this paper,the power spectral density(PSD)value within the frequency range of 0.01~20 Hz and the noise root-mean-square(RMS)values within the frequency range of 1~20 Hz of 48 seismic stations in Inner Mongolia are calculated by using the PDF method,the ambient noise level in Inner Mongolia was analyzed quantitatively.The results show that the average noise level of 45 stations classified as classⅠ,3 stations classified as classⅡ;Background seismic noise,for the frequency band above 1 Hz,it is mainly affected by highways and human beings;In the frequency range of 0.6~1 Hz,the difference of ambient noise is small;In the low frequency band,the influence of temperature and humidity on the horizontal direction is greater than that on the vertical direction,and that on the cave platform is less than that on the ground platform.
作者
安全
赵艳红
苏日亚
学峰
宋晓燕
AN Quan;Zhao Yanhong;SU Riya;XUE Feng;SONG Xiaoyan(Monitoring Center of Earthquake Agency of Inner Mongolia Autonomous Region,Hohhot 010010,China)
出处
《华北地震科学》
2021年第1期89-96,共8页
North China Earthquake Sciences
基金
内蒙古自治区地震局局长基金课题(2019JC11)。
关键词
内蒙古区域地震台网
背景噪声水平
PDF
Inner Mongolia regional seismic network
noise level of the station
PDF
