华南地震2025，Vol.45Issue(3)：35-41,7.DOI:10.13512/j.hndz.2025.03.05
利用背景噪声功率谱曲线变化判断备选台站台基质量
Judging the Quality of Alternative Station Foundation by the Change of Power Spectrum Curve of Background Noise
陈阳 1侍田宏 1朱涛 1王恩康 1王锡军 1李波 1刘飞2
作者信息
- 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
- 折叠
摘要
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.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Key words
Seismic station site selection/Noise power spectral density/Station fundation quality judgment/Noise/Interference分类
天文与地球科学引用本文复制引用
陈阳,侍田宏,朱涛,王恩康,王锡军,李波,刘飞..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,2025,45(3):35-41,7.
