宁陕地区台网台基背景噪声分析  

An Analysis of Background Noise of Each Network of Seismic Stations in Ningxia and Shaanxi Provinces

作　　者：靳源 李君 张佩[1] 柴旭超 JIN Yuan;LI Jun;ZHANG Pei;CHAI Xuchao

机构地区：[1]中国地震局第二监测中心,陕西西安710054

出　　处：《科技创新与应用》2020年第32期1-7,共7页Technology Innovation and Application

摘　　要：利用IRIS研发的Ispaq工具,选择陕西、宁夏两地台网43个测震台站48H无震稳定的连续波形记录,计算出每个台站的台基背景噪声功率谱,并绘制功率谱密度状态曲线进行统计分析,结果表明:各台网各台站的台基噪声背景优势频率具有不同的特征,有明显差异。在人为噪声影响较大的1~20Hz频段内,陕西榆林台、延安台,宁夏盐池台、牛首山台、香山台、盐池台受影响较大,低值区出现在陕西安康台、商南台、商州台、宁夏银川台。Using the Ispaq tool developed by IRIS,the 48H seismic stable continuous waveform records of 43 seismic stations in Shaanxi and Ningxia provinces are selected,the background noise power spectrum of each station is calculated,and the power spectral density state curve is drawn for statistical analysis.The results show that the dominant frequency of the background noise of each network has different characteristics and obvious differences.In the 1~20Hz frequency band which is greatly affected by man-made noise,Shaanxi's Yulin Station and Yan'an Station,and Ningxia's Yanchi Station,Niushou Mountain Station,Xiangshan Station and Yanchi Station are greatly affected,and the low value areas appear in Shaanxi's Ankang Station,Shangnan Station and Shangzhou Station,as well as Ningxia's Yinchuan Station.

关 键 词：宁夏 陕西 测震台网 数字台站 背景噪声 功率谱密度 

分 类 号：P315.78[天文地球—地震学]