[1]番绍辉,刘克骧,王光明,等.腾冲地震台背景噪声特征分析[J].华南地震,2026,46(05):20-27.[doi:10.13512/j.hndz.2026.05.03]
　FAN Shaohui,LIU Kexiang,WANG Guangming,et al.Analysis of Ambient Noise Characteristics at Tengchong Seismic Station[J].,2026,46(05):20-27.[doi:10.13512/j.hndz.2026.05.03]
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腾冲地震台背景噪声特征分析()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
46
期数:
2026年05期
页码:
20-27
栏目:
地震科学研究
出版日期:
2026-09-07

文章信息/Info

Title:
Analysis of Ambient Noise Characteristics at Tengchong Seismic Station
文章编号:
1001-8662（2026）05-0020-08
作者:
番绍辉; 刘克骧; 王光明; 周克鹏
云南省地震局，昆明 650051
Author(s):
FAN Shaohui; LIU Kexiang; WANG Guangming; ZHOU Kepeng
Yunnan Earthquake Agency, Kunming 650051, China
关键词:
腾冲地震台; 背景噪声; 概率密度函数; 日变特征; 不同频段
Keywords:
Tengchong Seismic Station;  Ambient noise;  Probability density function;  Diurnal variation characteris‐tics;  Different frequency bands
分类号:
P315
DOI:
10.13512/j.hndz.2026.05.03
文献标志码:
A
摘要:
利用腾冲地震台2018—2020年连续地震波形数据，通过噪声功率谱密度（PSD）和概率密度函数（PDF）计算，研究其不同频段下的背景噪声变化特征。结果表明：1Hz以上高频段噪声呈显著时间变化特征，日变规律与人类活动规律高度吻合，新冠疫情防控期间该频段噪声显著下降、日变特征减弱，而1Hz以下频段无明显差异，表明人类活动是高频段主导干扰源；0.05~0.5Hz微震频段观测到两类地脉动噪声峰值，受内陆地理位置影响，噪声能量集中于0.1~0.5Hz，该频段噪声由深海-近海海浪相互作用主导产生，冬季噪声水平较夏季高约2.5dB，且冬季噪声峰值出现频率低于夏季；0.05Hz以下长周期频段，腾冲地震台水平分量表现出白天噪声水平高于夜间的日变特征，与夏季噪声水平高于冬季的季节性变化特征，与气温、大气压变化相关，垂直分量无明显规律，反映腾冲地震台水平分量更易受温度扰动和大气压变化的影响。研究成果为台站背景噪声精准评估、台站布局优化及观测数据质量提升提供重要理论支撑与实践依据。
Abstract:
Based on the continuous seismic waveform data of Tengchong Seismic Station from 2018 to 2020, the vari‐ation characteristics of ambient noise in different frequency bands were studied by calculating the noise power spec‐tral density (PSD) and probability density function (PDF). The results show that the high-frequency noise above 1 Hz exhibits obvious temporal variation characteristics, and the diurnal variation law is highly consistent with the law of human activities. During the COVID-19 epidemic prevention and control period, the noise in this frequency band de‐creases significantly and the daily variation characteristics weaken, while there is no significant difference in the fre‐quency band below 1 Hz, indicating that human activities are the dominant interference source in the high frequen‐cy band. Two types of microseism noise peaks were observed in the 0.05-0.5 Hz microseismic frequency band. Af‐fected by the inland geographical location, the noise energy is concentrated in 0.1-0.5 Hz. The noise in this frequen‐cy band is dominated by the interaction between deep-sea and offshore waves. The noise level in winter is about 2.5 dB higher than that in summer, and the frequency of noise peaks in winter is lower than that in summer. In the long-period frequency band below 0.05 Hz, the horizontal component of observations at Tengchong seismic station pres‐ent distinct diurnal and seasonal variation characteristics: higher noise level in daytime than that at night and higher values in summer than that in winter, which are correlated with variations in temperature and atmospheric pressure. The vertical component has no obvious regularity, reflecting that the horizontal component of Tengchong Seismic Sta‐tion is more susceptible to temperature disturbance and atmospheric pressure change. The research results provide important theoretical support and practical basis for accurate ambient noise evaluation, station layout optimization and observation data quality improvement of seismic stations.

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备注/Memo

备注/Memo:
收稿日期：2025-11-24
基金项目：云南省地震局青年地震科学基金资助项目（2025K04）；云南省地震局创新团队（CXTD202508）；地震监测预报预警震情跟踪项目（CEA-ZQGZ-202501037）；中国地震局地震科技星火计划攻关项目（XH26027B）联合资助。
作者简介：番绍辉（1993-），男，工程师，主要从事地震监测与研究。E-mail: 250336803@qq.com
更新日期/Last Update: 2026-09-20