强震前后广义地震应变释放过程的丛集特征

地震 ›› 2003, Vol. 23 ›› Issue (2): 29-38.

强震前后广义地震应变释放过程的丛集特征

陈时军¹, 马丽², 王丽凤², David Harte³

1.山东省地震局,山东济南 250014;
2.中国地震局分析预报中心,北京 100036;
3.新西兰统计学联合会,新西兰惠灵顿 PO Box 12-649

收稿日期:2002-05-08 修回日期:2002-08-30 出版日期:2003-04-30 发布日期:2021-12-21
作者简介:陈时军(1963-),男,河南虞城人,副研究员,2000 年在读博士生,主要从事地震危险性预测、统计地晨学等研究。
基金资助:
国家自然科学基金项目(40074013); 山东省地晨局博士基金项目(2002)

Research on the cl ustering of general ized seismic strain rel ease process before and after strong earthquake occurrence

CHEN Shi-jun¹, MA Li², WANG Li-feng², DAVID Harte³

1. Seismological Bureau of Shandong Province, Jinan 250014;
2. Center for Analysis and Prediction, CSB,Beijing 100036, China;
3. Statistical Association Ltd. Wellington, New Zealand, 12-649

Received:2002-05-08 Revised:2002-08-30 Online:2003-04-30 Published:2021-12-21

摘要/Abstract

摘要： 利用基于小波变换的多重分形奇异谱估计方法,研究了部分强震前后地震活动广义应变.释放过程的多重分形特征。结果表明,晨中区附近- -定范围内地展活动广义应变释放过程具有多重分形特征,但多重分形维数谱随7变化复杂,在强震发生前多重分形维数谱没有明显的变化。广义地震应变释放过程的多重分形奇异谱形态和Hausdorff奇异指数范围能提供更多关于地屣活动过程的信息,特别当η取较大值时Hausdorff奇异指数范围在强晨前明显变窄。研究还表明深源地展和浅源地晨发生前广义应变释放过程多重分形特征存在明显不同。

关键词: 小波变换, 多重分形, 广义地震应变释放

Abstract: By using the wavelet transition- based multifractal spectrum estimation method, themultif ractal characteristics of generalized seismic strain release process before and after strongearthquake occurrence have been discussed. The results show that the multifractal dimensionspectrum varies seriously with the changes of the parameter 7. It is also found that the multi-fractal dimension spectrum doesn't change obviously before and after strong earthquake occur-rence. The multifractal singular spectrum and the range of Hausdorff singular index could pro-vide more information on seismically active process, especially when the parameter n is higher(e.g. larger than 1). The range of Hausdorff singular index is obviously going narrower be-fore strong earthqua ke occurrence. Also, the multifractal characteristics of generalized seismicstress release process are apparently different for deep and shallow strong events.

Key words: Wavelet transition, Multifractal, Generalized seismic strain release

中图分类号:

P315.5

陈时军, 马丽, 王丽凤, David Harte. 强震前后广义地震应变释放过程的丛集特征[J]. 地震, 2003, 23(2): 29-38.

CHEN Shi-jun, MA Li, WANG Li-feng, DAVID Harte. Research on the cl ustering of general ized seismic strain rel ease process before and after strong earthquake occurrence[J]. EARTHQUAKE, 2003, 23(2): 29-38.

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