[1]陈 阳,侍田宏,朱 涛,等.利用背景噪声功率谱曲线变化判断备选台站台基质量[J].华南地震,2025,(03):35-41.[doi:10.13512/j.hndz.2025.03.05]
　CHEN Yang,SHI Tianhong,ZHU Tao,et al.Judging the Quality of Alternative Station Foundation by the Change of Power Spectrum Curve of Background Noise[J].,2025,(03):35-41.[doi:10.13512/j.hndz.2025.03.05]
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利用背景噪声功率谱曲线变化判断备选台站台基质量()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年03期
页码:
35-41
栏目:
地震科学研究
出版日期:
2025-09-30

文章信息/Info

Title:
Judging the Quality of Alternative Station Foundation by the Change of Power Spectrum Curve of Background Noise
文章编号:
1001-8662（2025）03-0035-07
作者:
陈 阳1; 侍田宏1; 朱 涛1; 王恩康1; 王锡军1; 李 波1; 刘 飞2
1.云南省通海地震监测中心站，云南 通海 652700;2.云南省红河州哈尼族彝族自治州地震局，云南 蒙自 661199
Author(s):
CHEN Yang1; SHI Tianhong1; ZHU Tao1; WANG Enkang1; WANG Xijun1; LI Bo1; LIU Fei2
1.Tonghai Earthquake Monitoring Center of Yunnan Province ， Tonghai 652700， China;2.Seismological Bureau of Honghe Hani and Yi Autonomous Prefecture ， Mengzi 661199， China
关键词:
测震台站选址; 噪声功率谱密度; 台基质量判断; 噪声; 干扰
Keywords:
Seismic station site selection;  Noise power spectral density;  Station fundation quality judgment; Noise; Interference
分类号:
P315.78
DOI:
10.13512/j.hndz.2025.03.05
文献标志码:
A
摘要:
以云南金平、麻栗坡和河口三个测震台站选址为例，通过对比初勘台和复勘台台址24h背景噪声功率谱曲线的差异，阐述了功率谱曲线离散程度所揭示的台基质量问题：功率谱曲线离散程度大的台址，容易受到干扰的影响；而功率谱曲线收敛、离散程度小的台址，质量较好，不容易受到近场干扰的影响；表明功率谱曲线的离散程度反映了台址对近场干扰的免疫能力。进一步的研究结果显示，短周期地震计记录数据功率谱曲线的低频离散主要来源于通带外记录到的倾斜信号等效，而高频段的干扰信号主要来源于近场的震动干扰，降低上述干扰的关键在于将仪器架设在基岩而不是滚石上。这一认识在后续的复勘调查中得到了证实。
Abstract:
Taking the sites of three seismic stations in Jinping，Malipo，and Hekou，Yunnan Province as exam?ples， this paper explained the quality of the station foundation revealed by the degree of dispersion of the power spectrum curves by comparing the differences in the 24-hour background noise power spectrum curves of the sites of the preliminary survey and re-survey stations. The station sites with a high degree of dispersion of the power spec?trum curves were susceptible to the influence of interference， whereas those with a convergent and low degree of dispersion of the power spectrum curves had a superior quality and were not susceptible to the influence of near-field interference. This result suggests that the degree of dispersion of power spectrum curves is indicative of the im?munity of the station sites to near-field interference. Further investigation indicates that the low-frequency disper?sion of the power spectrum curve of short-period seismometer recording data mainly originates from the equivalent tilt signals recorded outside the passband. Conversely，the interfering signals in the high-frequency band predomi?nantly emanate from the near-field vibrational interferences. The key to reducing the aforementioned interference lies in setting up the instrument on bedrock rather than on rolling stones. This hypothesis has been substantiated by the subsequent re-survey.

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备注/Memo

备注/Memo:
收稿日期：2024-10-08
作者简介：陈阳（1980-），男，工程师，主要从事地震监测、震相分析及预警运维工作。E-mail：27363555@qq.com
更新日期/Last Update: 2025-09-30