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| 强震前后广义地震应变释放过程的丛集特征 | |
| 引用本文： | 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. |
| 作者姓名： | 陈时军 马丽 王丽凤 David Harte |
| 作者单位： | 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 |
| 基金项目： | 国家自然科学基金(40074013)，山东省地震局博士基金(2002) |
| 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，震中区附近一定范围内地震活动广义应变释放过程具有多重分形特征，但多重分形维效谱随η变化复杂，在强震发生前多重分形维效谱没有明显的变化。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震活动过程的信息，特别当η取较大值时Hausdorff奇异指数范围在强震前明显变窄。研究还表明深源地震和浅源地震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 奇异谱 地震活动性 |
| 文章编号： | 1000-3274(2003)02-0029-10 |
| 修稿时间： | 2002年5月8日 |
Research on the clustering of generalized seismic strain release process before and after strong earthquake occurrence |
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| CHEN Shi-jun,MA Li,WANG Li-feng,DAVID Harte.Research on the clustering of generalized seismic strain release process before and after strong earthquake occurrence[J].Earthquake,2003,23(2):29-38. | |
| Authors: | CHEN Shi-jun MA Li WANG Li-feng DAVID Harte |
| Abstract: | By using the wavelet transition-based multifractal spectrum estimation method, the multifractal characteristics of generalized seismic strain release process before and after strong earthquake occurrence have been discussed. The results show that the multifractal dimension spectrum varies seriously with the changes of the parameter.It is also found that the multi-fractal dimension spectrum doesn't change obviously before and after strong earthquake occurrence. The multifractal singular spectrum and the range of Hausdorff singular index could provide more information on seismically active process, especially when the parameter is higher (e. g. larger than 1). The range of Hausdorff singular index is obviously going narrower before strong earthquake occurrence. Also, the multifractal characteristics of generalized seismic stress release process are apparently different for deep and shallow strong events. |
| Keywords: | Wavelet transition Multifractal Generalized seismic strain release |
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