| 三峡库首区重复重力资料的小波分解与构造活动 |
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| 引用本文： | 刘少明,申重阳,孙少安,陈步云. 三峡库首区重复重力资料的小波分解与构造活动[J]. 大地测量与地球动力学, 2005, 25(1): 13-18 |
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| 作者姓名： | 刘少明 申重阳 孙少安 陈步云 |
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| 作者单位： | 中国地震局地震研究所,武汉,430071;地壳运动与地球观测实验室,武汉,430071;中国地震局地壳应力研究所武汉创新基地,武汉,430071 |
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| 基金项目： | 长江三峡水库诱发地震监测研究项目;地震科学联合基金 |
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| 摘 要： | 对三峡库首区1989年8月以来的重力观测资料进行了小波分解。对分解结果的主要特征进行了描述，并结合三峡库首区的构造活动特征对分解结果进行了解释：三峡地区的重力变化主要集中在一阶小波分解细节中，说明三峡地区的重力场变化主要是由浅层物质密度变化引起的。对1997年8月10日测网右侧附近发生的Ms3．7地震与重力小波分解结果的关系进行了讨论。
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| 关 键 词： | 三峡地区 重力变化 小波分解 构造活动 地震 |
| 文章编号： | 1671-5942(2005)01-0013-06 |
| 修稿时间： | 2004-07-23 |
WAVELET DECOMPOSITION OF REPEATED GRAVITY DATA AND TECTONIC ACTIVITIES IN FRONT AREA OF THREE GORGES RESERVOIR |
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| Liu Shaoming,Shen Chongyang,Sun Shaoan,Chen Buyun. WAVELET DECOMPOSITION OF REPEATED GRAVITY DATA AND TECTONIC ACTIVITIES IN FRONT AREA OF THREE GORGES RESERVOIR[J]. Journal of Geodesy and Geodynamics, 2005, 25(1): 13-18 |
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| Authors: | Liu Shaoming Shen Chongyang Sun Shaoan Chen Buyun |
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| Abstract: | The gravity observation data obtained from the front area of the Three Gorges reservoir since Aug. 1989 are decomposed by wavelet method. The main characters of the decomposition results are described. The decomposition results combined with the tectonic activity characters of the area are explained. The 1st order wavelet decomposition details are main part of the gravity changes in Three Gorges area, which indicates that the gravity changes in the area are mainly result from the matter density changes in the upper part of the crust. The relation between the earthquake %M%s3.7 that occurred at the right side of the gravity network in Aug. 10th, 1997 and the wavelet decomposition results of gravity changes in the area is discussed. |
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| Keywords: | the Three Gorges area gravity change wavelet decomposition tectonic activity earthquake |
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