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| 利用小波变换方法分析跨断层形变异常 | |
| 引用本文： | 李杰,李明海,刘希强,张京华,郑树田,范军.利用小波变换方法分析跨断层形变异常[J].大地测量与地球动力学,2004,24(3):73-78. |
| 作者姓名： | 李杰 李明海 刘希强 张京华 郑树田 范军 |
| 作者单位： | 1. 山东省地震局,济南,250014 2. 郑州测绘学校,郑州,4500052 3. 山东省潍坊市地震局,潍坊,261041 4. 山东省安丘市地震局,安丘,262100 |
| 基金项目： | 山东省自然基金项目 (Y2 0 0 0E0 8)，2 0 0 4年山东省地震局合同制项目 |
| 摘 要： | 为了从跨断层形变观测资料中获取中强地震的前兆异常信息，运用二进小波变换方法和噪声与信号的定量识别方法，分析了不同尺度的小波变换的细节信号变化特征。研究结果表明：(1)不同尺度小波变换分解的细节信号显示出不同的时变特征。当尺度为1时。细节信号主要为噪声；尺度为2、4、5时，细节信号主要为非平稳信号；尺度为3时，细节信号主要为平稳周期信号；(2)每月观测一次的跨断层形变资料在尺度为3时的细节信号有较好的年周期特征；(3)当尺度为3时的细节信号变化超出2倍均方误差时，测点周围200km左右范围内发生中强地震的可能性很大。 |
| 关 键 词： | 小波变换 跨断层形变观测 地震前兆异常 地震预测 |
| 文章编号： | 1671-5942(2004)03-0073-06 |
| 修稿时间： | 2004年3月7日 |
ANALYSES OF ANOMALY OF CROSS-FAULT DEFORMATION AFTER WAVELET TRANSFORM METHOD |
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| Li Jie,Li Minghai,Liu Xiqiang,Zhang Jinghua,Zheng Shutian and Fan Jun Earthquake Administration of Shandong Province,Jinan Specialized School of Surveying and Mapping Zhengzhou,Zhengzhou\ Earthquake Administration of Weifang City,Weifang Earthquake Administration of Anqiu City,Anqiu.ANALYSES OF ANOMALY OF CROSS-FAULT DEFORMATION AFTER WAVELET TRANSFORM METHOD[J].Journal of Geodesy and Geodynamics,2004,24(3):73-78. | |
| Authors: | Li Jie Li Minghai Liu Xiqiang Zhang Jinghua Zheng Shutian and Fan Jun Earthquake Administration of Shandong Province Jinan Specialized School of Surveying and Mapping Zhengzhou Zhengzhou\ Earthquake Administration of Weifang City Weifang Earthquake Administration of Anqiu City Anqiu |
| Affiliation: | Li Jie1),Li Minghai2),Liu Xiqiang1),Zhang Jinghua3),Zheng Shutian+4) and Fan Jun+3) 1) Earthquake Administration of Shandong Province,Jinan 250014 2) Specialized School of Surveying and Mapping Zhengzhou,Zhengzhou\ 450005 3) Earthquake Administration of Weifang City,Weifang 261041 4) Earthquake Administration of Anqiu City,Anqiu 262100 |
| Abstract: | In order to catch the seismic anomalous informations from deformation observation before moderately strong earthquake, we applied wavelet transform method and quantitative recognition method of noise and signal to analyze the characteristics of the detailed part of signal variation after wavelet decomposition. The research results indicate that: (1)the detailed decomposed signal characteristics of wavelet were different when the scale was different:The detailed decomposing signal of wavelet contains mainly noise corresponding with scale 1; the detailed decomposing signal is non stationary when scale are equal to 2,4 and 5,and the signal is quasi periodic when scale is equal to 3;(2)The detailed signal of wavelet of monthly cross fault deformation data have annually periodic feature when scale is equal to 3;(3)It is considerably possible that a moderately strong earthquake will occur in the range of about 200 km from the observation point when the detailed signal variation exceeds the double mean square error and the scale is 3. |
| Keywords: | wavelet transform cross-fault deformation data the separation of signal from white noise precursory anomaly of earthquake earthquake prediction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
