| 华北时变重力场离散小波多尺度分解 |
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| 引用本文： | 刘芳,祝意青,陈石.华北时变重力场离散小波多尺度分解[J].中国地震研究,2014(3):360-369. |
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| 作者姓名： | 刘芳 祝意青 陈石 |
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| 作者单位： | 中国地震局第二监测中心 西安市西影路316号， 710054;中国地震局第二监测中心 西安市西影路316号， 710054;中国地震局地球物理研究所 北京， 100081 |
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| 摘 要： | On the basis of the absolute and relative gravity observations in North China, spatial dynamic variation of regional gravity fields is obtained. A multi-scale decomposition technique is used to separate anomalies at different depths, and give some explanation to gravity variation at different time space scales. Gravity variation trends in North China are improved. Based on this result and the analysis of wavelet power spectrum, the images of the depth of wavelet approximation and detail are obtained. The results obtained are of scientific significance for the deep understanding of potential seismic risk in North China from gravity variations in different time space scales.
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| 关 键 词： | 小波多尺度分解 重力变化 中国北方 离散 空间尺度 区域重力场 小波功率谱 地震危险性 |
| 收稿时间： | 2012/9/14 0:00:00 |
Discrete Wavelet Multi scale Decomposition of the Temporal Gravity Variations in North China1 |
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| Liu Fang,Zhu Yiqing and Chen Shi.Discrete Wavelet Multi scale Decomposition of the Temporal Gravity Variations in North China1[J].Earthquake Research in China,2014(3):360-369. |
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| Authors: | Liu Fang Zhu Yiqing and Chen Shi |
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| Institution: | [1]Second Crust Monitoring and Application Center, CEA, Xi'an 710054, China; [2]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | On the basis of the absolute and relative gravity observations in North China, spatial dynamic variation of regional gravity fields is obtained. A multi scale decomposition technique is used to separate anomalies at different depths, and give some explanation to gravity variation at different time space scales. Gravity variation trends in North China are improved. Based on this result and the analysis of wavelet power spectrum, the images of the depth of wavelet approximation and detail are obtained. The results obtained are of scientific significance for the deep understanding of potential seismic risk in North China from gravity variations in different time space scales. |
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| Keywords: | Wavelet decomposition Multi scale Gravity variation field Power spectrum North China |
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