| 门源6.4级强震前地震活动时间的分维结构 |
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| 引用本文： | 李海华,张文孝,张勇利,马文静,郭亚平.门源6.4级强震前地震活动时间的分维结构[J].西北地震学报,1987,9(4):15-20. |
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| 作者姓名： | 李海华 张文孝 张勇利 马文静 郭亚平 |
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| 作者单位： | 国家地震局兰州地震研究所
(李海华，张勇利)，宁夏回族自治区地震局
(张文孝)，青海省地震局
(马文静)，青海省地震局(郭亚平) |
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| 摘 要： | 本文应用分维概念与方法,引入度量地震活动时间不均匀结构的物理量D对门源地区(37—38°N,101°30′—103°E)1970—1985年地震活动的时间结构进行了初步分析。发现门源6.4级强震前D值随时间系统减小,表明愈接近强震发生时间,该地区地震活动的时间结构愈不均匀,即对称性破缺或有序性增强,其有序性具有多层次嵌套的自相似特征。
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| 收稿时间： | 1987/7/5 0:00:00 |
THE TEMPORAL FRACTAL STRUCTURE OF SMALL SEISMIC ACTIVITY BEFORE THE MENYUAN EARTHQUAKE(M=6.4) |
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| Li Haihu,Zhang Wenxiao,Zhang Yongli,Ma Wenjing and Guo Yaping.THE TEMPORAL FRACTAL STRUCTURE OF SMALL SEISMIC ACTIVITY BEFORE THE MENYUAN EARTHQUAKE(M=6.4)[J].Northwestern Seismological Journal,1987,9(4):15-20. |
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| Authors: | Li Haihu Zhang Wenxiao Zhang Yongli Ma Wenjing and Guo Yaping |
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| Institution: | Seismological Institute of Lanzhou, State Seismological Bureau,Seismological Institute of Lanzhou, State Seismological Bureau,Seismological Institute of Lanzhou, State Seismological Bureau,Seismological Institute of Lanzhou, State Seismological Bureau and Seismological Institute of Lanzhou, State Seismological Bureau |
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| Abstract: | This paper, by means of the fractal method and fractal dimension D, studies preliminarily on the temporal fractal structure of seismic activity in the Menyuan area during 1970-1985. The result shows that there is D value and it changes from 0.58 to 0.42 before the Menyuan earthquake(M=6.4). It indicates that the temporal structure of seismic activity in this area trends forward more neterogeneows, i. e. the symmetry is broken or the ordering is strengthened, when the strong earthquake is more approaching to occur.The ordering has the characteristic of the multiple levels with self similar mosaic structures. It has not only the prediction meaning but also the theoretical meaning. |
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