| 两次强震过程中垂直地形变分维特征研究 |
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| 引用本文： | 王双绪,张永志. 两次强震过程中垂直地形变分维特征研究[J]. 大地测量与地球动力学, 1993, 0(4) |
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| 作者姓名： | 王双绪 张永志 |
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| 作者单位： | 国家地震局第二地形变监测中心，国家地震局第二地形变监测中心 西安 710054，西安 710054 |
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| 摘 要： | 本文采用关联维的计算方法,对四川西部道孚6.9级地震和青海共和6.9级地震过程中的垂直地形变序列分维数进行了计算,得到了如下初步结论和认识:(1)上述两震区远场地形变序列分维数为0.63～0.73,而近场(震中区)序列分维数为0.12～0.49,近场出现明显的降维现象;(2)孕震期间地形变观测序列分维数为0.32～0.46,而震后时期则为0.72～0.85,孕震过程中地形变序列存在明显的降维现象。
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| 关 键 词： | 垂直形变 分维变化 远场 近场 |
CHARACTERS OF FRACTAL DIMENSION OF VERTICAL DEFORMATION DURING TWO STRONG EARTHQUAKES |
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| Wang Shuangxu and Zhang Yongzhi. CHARACTERS OF FRACTAL DIMENSION OF VERTICAL DEFORMATION DURING TWO STRONG EARTHQUAKES[J]. Journal of Geodesy and Geodynamics, 1993, 0(4) |
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| Authors: | Wang Shuangxu and Zhang Yongzhi |
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| Abstract: | In this paper,the fractal dimensions of vertical deformation during Daofu M_s6.9 earthquake in Sichuan province and Gonghe M_s6.9 earthquake in Qinghai province are calculated. The conclusion and results are:1. The values of fractal dimension of vertical deformation are from 0. 63 to 0. 73 in far-off epicentral region and from 0. 12 to 0. 49 in epicentral region during the two strong earthquakes, it is obvious that the fractal dimension of vertical deformation in epicentral area decrease during the earthquakes; 2. The values of fractal dimension after the earthquakes are from 0.72 to 0.85, and before earthquakes are from 0.32 to 0.46 in epicentral area. It is obvious that the values of vertical deformation decrease before or during the earthquakes in epicentral region. |
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| Keywords: | vertical deformation change of fractal dimension far-off region epicentral region |
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