| 活动断裂带中地震分布时空结构的信息维 D1sub>特征初探 |
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| 引用本文： | 徐叶邦.活动断裂带中地震分布时空结构的信息维 D1sub>特征初探[J].地震学报,1991,13(3):372-379. |
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| 作者姓名： | 徐叶邦 |
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| 作者单位： | 中国 成都 610041 四川省地震局 |
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| 摘 要： | 活动断裂带中地震时空分布的信息维 D1避免了容量维 D0的缺陷,考虑了每一地震事件对信息所作的贡献,从新的角度反映了地震分布时空结构特征.计算表明,炉霍大震前鲜水河断裂带地震分布时间结构信息维 D1=0.1051,这是该区大震活动的一个参考性判据.安宁河断裂带十七年现今地震分布时间结构信息维:北段,D1（tN）=0.1363;南段,D1（tS）=0.06710.地震空间分布信息维:北段,D1（KN）=1.053;南段,D1（Ks）=0.7758.南北两段分属信息维维数不同的两个自相似系统.南段地震活动自组织程度较高.这有助于强震重点监测区内主要危险段的判定地震时空分布 D1特征探索对于活断层研究以及地震预报都有一定的意义.
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| 关 键 词： | 活动断裂 地震时空分布 信息维 |
A STUDY ON THE CHARACTERISTICS OF THE INFOR- MATION DIMENSION D1 OF THE TEMPORAL AND SPATIAL DISTRIBUTIONS OF EARTHQUAKES IN AN ACTIVE FAULT ZONE |
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| Abstract: | The research of the information dimension (D1) in an active fault zone considers the contribution of each seismic event to information and reflects the charact eristics of the temporal and spatial distributions of earthquakes from a new point of view, avoiding the shortcomings of the research about the fractal dimension of capacity (D0).The results of calcu ation show that the information dimension of the temporal distribution in the Xianshuihe active fault zone before the great Luhuo earthquake is D1 =0.1051. It is a consult creterion of large earthquakes in future in the fault zone. The information dimensions lof the temporal distribution of earthquakes about 17 years in the Anninghe active fault zone are respectively D1(tN) =0.1363 (for the north section )and A(ts) =0.06710 (for the south section ). The information dimensions of the spatial distribution are respectively D1(KN) = 1.053 (for the north section )and D1( Ks) = 0.7758 (for the south section ). The north section and the south section belong respectively to two self- similar systems with different information dimensions.The extent of the self- organization of seismic activity in the south section is higher than that in the north section. This is helpful for judging the major dangerous section in the key region of the seismic monitoring. The research about the information dimension of the temporal and spatial ditributions of earthquakes is significant for the exploration of active fault zones and seismisc prediction. |
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