| 模糊空间分维在地震活动时空演化研究中的应用 |
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| 引用本文： | 刘喜兰,冯德益.模糊空间分维在地震活动时空演化研究中的应用[J].地球物理学进展,1992(3). |
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| 作者姓名： | 刘喜兰 冯德益 |
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| 作者单位： | 天津地震局，天津地震局 天津 300201，天津 300201 |
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| 摘 要： | 本文把模糊分维方法应用于地震活动时空演化研究,当中.给出了强震和中强震活动模糊空间分维的确定方法,并通过计算不同小区的模糊空间分维随时间的变化曲线来研究地震活动的时空演化特征.以华北及西南地区地震活动性时空演化图象为例进行了具体分析研究.所得结果表明,大震前地震活动的模糊空间分维D_0~(2)要出现下降异常,并且大地震发生在D_0~(2)减小的地区(西南)或先减小而后达到高值(华北)的地区.
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| 关 键 词： | 模糊空间分维 地震活动时空演化 华北地区 西南地区 |
APPLICATION OF FUZZY SPATIAL FRACTAL DIMENSION IN THE STUDY OF TEMPORAL-SPATIAL EVOLUTION OF SEISMICITY |
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| Liu Xilan Feng Deyi.APPLICATION OF FUZZY SPATIAL FRACTAL DIMENSION IN THE STUDY OF TEMPORAL-SPATIAL EVOLUTION OF SEISMICITY[J].Progress in Geophysics,1992(3). |
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| Authors: | Liu Xilan Feng Deyi |
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| Institution: | Seismological Bureau of Tianjin Tianjin 300201 |
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| Abstract: | In this paper. the method of fuzzy fractal dimension has been applied to the study on the temporal-spatial evolution of seismic activity. The method for determining the fuzzyspatial fractal dimension of the activity of strong and moderate earthquakes was given, and the characteristics of temporal-spatial evolution of seismic activity were studied by calculating the time-variable curves of fuzzy spatial fractal dimension in the different small regions. As an example the concrete analyses and studies were completed for North China and some regions of West-South China. The result obtained shows that before the large earthquakes the fuzzy spatial fractal dimension D_0~(2) decreased dramatically, and the large earthquakes occurred in the regions where either the values of D_0~(2) decreases (West-South China) or at first decreases. and then increases to high value (North China). |
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| Keywords: | Fuzzy spatial fractal dimension Temporal-spatial evolution of seismicity North China region West-South China region |
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