地震地磁观测与研究2026，Vol.47Issue(1)：29-35,7.DOI:10.3969/j.issn.1003-3246.2026.01.005
蒙宁交界地区测震台站环境背景噪声特征分析
Analysis of the characteristics of ambient background noise at seismic stations in the region of the Nei Mongol-Ningxia border
摘要
Abstract
Seismic environmental background noise is caused by multiple sources across specific frequency bands.Quantifying environmental background noise can help evaluate the quality of stations'observations.Based on the continuous waveform data recorded by six seismic stations in the border area of Nei Mongol and Ningxia from January 1 to March 31,2024,the background noise characteristics and noise diurnal variation of seismic stations in the study area are analyzed and studied by calculating RMS,PSD,and PDF distributions,and the influence of human activities on background noise is determined.The results show that RMS values at all seismic stations exhibit a diurnal variation,with low values during the daytime and high values at night in the frequency band of 1-20 Hz.The background noise levels at Zhongwei,Bayanhot,Shizuishan,and Wuhai seismic stations are relatively high due to varying degrees of human disturbance;Yinchuan and Wujiahe seismic stations have good windbreak and heat-preservation effects,and the surrounding human activities are few,so the background noise level is relatively low.The high-frequency noise of seismic stations is mainly affected by human activities.The seismic stations located in industrial areas,urban peripheries,and mine areas have relatively high noise levels in the high-frequency band,and these levels vary greatly day and night.In agricultural,mountainous,and less-populated areas with little human and industrial activity,station background noise levels are low,and daily variation is small.关键词
测震台站/背景噪声/人类活动/高频频段Key words
seismic station/background noise/human activity/high-frequency band引用本文复制引用
苏世兵,王旭东,王有鹏..蒙宁交界地区测震台站环境背景噪声特征分析[J].地震地磁观测与研究,2026,47(1):29-35,7.基金项目
本研究由内蒙古自治区地震局资助,在此表示感谢. （）
