| 昆明地震台地面与井下地震观测背景噪声对比 |
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| 引用本文： | 李雷,钱文品,邓存华,赵晋民,陈翔,白仙富.昆明地震台地面与井下地震观测背景噪声对比[J].地震地磁观测与研究,2017,38(5):86-95. |
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| 作者姓名： | 李雷 钱文品 邓存华 赵晋民 陈翔 白仙富 |
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| 作者单位： | 1. 中国云南 650204 昆明基准地震台;2. 中国昆明 650224 云南省地震局 |
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| 摘 要： | 对昆明地震台山洞内放置的宽频带地震仪BBVS-60及观测井内放置的GL-S60B深井宽频带地震仪所记录的资料,进行背景噪声对比分析,得到基岩地区地面及井下背景噪声干扰,为今后在云南地区推广井下观测提供参考依据。结果显示,在1—20 Hz频段内,井下台背景噪声RM_S值比地表台小,降噪效果UD向达30%以上,EW向达50%,NS向达60%。在100—30 s频带内噪声不降反升,原因有待进一步分析。
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| 关 键 词： | 观测井 宽频带地震仪 噪声分析 |
Comparative analysis of Kunming Seismic Station surface and borehole seismic background noise |
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| Li Lei,Qian Wenpin,Deng Cunhua,Zhao Jinmin,Chen Xiang,Bai Xianfu.Comparative analysis of Kunming Seismic Station surface and borehole seismic background noise[J].Seismological and Geomagnetic Observation and Research,2017,38(5):86-95. |
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| Authors: | Li Lei Qian Wenpin Deng Cunhua Zhao Jinmin Chen Xiang Bai Xianfu |
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| Institution: | 1. Kunming Seismic Station, Yunnan Province 650204, China;2. Yunnan Earthquake Agency, Kunming 650224, China |
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| Abstract: | broad-band seismometer BBVS-60 is placed within a cave at Kunming Seismic Station and borehole seismometer GL-S60B is placed within the observation well, broad-band seismograph recorded data for comparative analysis of background noise, and concludes that the bedrock surface and borehole noise and interference for the future promotion provided a reference for borehole observed in Yunnan region. The results show that the borehole noise in the 1-20 Hz band RMS value is smaller than the surface, UD noise reduction effect to the above 30%, EW reach 50%, NS to 60%. At the 100-30 s band the noise does not fall but rise, requires further study. |
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| Keywords: | observation well broadband seismograph noise analysis |
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