| Application of Wavelet Decomposition to Removing Barometric and Tidal Response in Borehole Water Level |
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| 作者姓名： | Yan Rui Huang Fuqiong and Chen Yong China Earthquake Networks Center Beijing China Institute of Earthquake Science Beijing China Institute of Geophysics China Earthquake Administration Beijing China |
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| 作者单位： | Yan Rui 1，2)，Huang Fuqiong 1) and Chen Yong 3) 1) China Earthquake Networks Center，Beijing 100045，China2) Institute of Earthquake Science，Beijing 100036，China3) Institute of Geophysics，China Earthquake Administration，Beijing 100081，China |
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| 基金项目： | 国家自然科学基金;国家地震局资助项目 |
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| 摘 要： | Wavelet decomposition is used to analyze barometric fluctuation and earth tidal response in borehole water level changes. We apply wavelet analysis method to the decomposition of barometric fluctuation and earth tidal response into several temporal series in different frequency ranges. Barometric and tidal coefficients in different frequency ranges are computed with least squares method to remove barometric and tidal response. Comparing this method with general linear regression analysis method, we find wavelet analysis method can efficiently remove barometric and earth tidal response in borehole water level. Wavelet analysis method is based on wave theory and vibration theories. It not only considers the frequency characteristic of the observed data but also the temporal characteristic, and it can get barometric and tidal coefficients in different frequency ranges. This method has definite physical meaning.
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Application of Wavelet Decomposition to Removing Barometric and Tidal Response in Borehole Water Level |
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| Yan Rui ,,Huang Fuqiong and Chen Yong China Earthquake Networks Center,Beijing ,China Institute of Earthquake Science,Beijing ,China Institute of Geophysics,China Earthquake Administration,Beijing ,China.Application of Wavelet Decomposition to Removing Barometric and Tidal Response in Borehole Water Level[J].Earthquake Research in China,2007,21(4). |
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| Authors: | Yan Rui Huang Fuqiong Chen Yong |
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| Abstract: | Wavelet decomposition is used to analyze barometric fluctuation and earth tidal response in borehole water level changes. We apply wavelet analysis method to the decomposition of barometric fluctuation and earth tidal response into several temporal series in different frequency ranges. Barometric and tidal coefficients in different frequency ranges are computed with least squares method to remove barometric and tidal response. Comparing this method with general linear regression analysis method, we find wavelet analysis method can efficiently remove barometric and earth tidal response in borehole water level. Wavelet analysis method is based on wave theory and vibration theories. It not only considers the frequency characteristic of the observed data but also the temporal characteristic, and it can get barometric and tidal coefficients in different frequency ranges. This method has definite physical meaning. |
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| Keywords: | Wavelet decomposition Least squares method Earth-tide coefficients Barometric coefficients |
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