| 内蒙古山洞台站背景噪声特征分析 |
| |
| 引用本文： | 安全,赵艳红,郭延杰,刘永梅.内蒙古山洞台站背景噪声特征分析[J].大地测量与地球动力学,2021,41(12):1312-1316. |
| |
| 作者姓名： | 安全 赵艳红 郭延杰 刘永梅 |
| |
| 作者单位： | 内蒙古地震台,呼和浩特市哲里木路80号,010010;呼和浩特地震监测中心站,呼和浩特市回民区,010010;赤峰地震监测中心站,内蒙古自治区赤峰市红山路,024000 |
| |
| 摘 要： | 计算内蒙古测震台网2019-12~2020-11山洞观测数据的加速度功率谱密度（PSD）和相应的概率密度函数(PDF)，研究相应台站的背景噪声特征。结果表明，高频段背景噪声的昼夜差异显著，疫情防控期间噪声水平明显低于其他时段；次级微震频段背景噪声季节性变化显著，噪声水平冬季强、夏季弱，随着台站离海岸线距离增大，PSD峰值有逐渐减小的趋势；主微震频段背景噪声在10~20 s均有峰值，峰值冬季最强，春、夏、秋季基本没有差异，不同台站同一季节峰值差异小；长周期段噪声水平四季差异不大，春、夏季略高于秋、冬季。
|
| 关 键 词： | 背景噪声 山洞观测 概率密度函数 功率谱密度 |
Analysis of Background Noise Characteristics of Cave Observation Stations of Inner Mongolia Seismic Network |
| |
| AN Quan,ZHAO Yanhong,GUO Yanjie,LIU Yongmei.Analysis of Background Noise Characteristics of Cave Observation Stations of Inner Mongolia Seismic Network[J].Journal of Geodesy and Geodynamics,2021,41(12):1312-1316. |
| |
| Authors: | AN Quan ZHAO Yanhong GUO Yanjie LIU Yongmei |
| |
| Abstract: | By calculating power spectrum density (PSD) and probability density function (PDF) of continuous waveform data from cave observation from Inner Mongolia seismic network from December 2019 to November 2020, we analyze background noise characteristics of the stations.The results show that background noise in the high frequency band is significantly different between day and night, the noise level during the COVID-19 pandemic is significantly lower than other times.The background noise in the secondary microseismic frequency band has a significant seasonal variation, the noise level is stronger in winter than in summer, the peak value of PSD decreases with the increase of distance from stations to the coastline. The background noise in the main microseismic frequency band has a peak in 10-20 s, the peak value is highest in winter, with no difference in spring, summer and autumn, and the difference of peak values in the same season is small at different stations.The noise level in the long period has little difference between the four seasons. Spring and summer are slightly higher than autumn and winter. |
| |
| Keywords: | background noise cave observation probability density function power spectrum density |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
