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地震 ›› 2002, Vol. 22 ›› Issue (2): 74-80.

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华北地震时空多重分形的时间演化特征研究

蔡强, 周成虎, 裴韬, 韩志军, 汪闽, 秦承志   

  1. 中国科学院资源与环境信息系统国家重点实验室, 北京 100101
  • 收稿日期:2001-07-04 修回日期:2001-09-17 出版日期:2002-04-30 发布日期:2021-12-21
  • 作者简介:蔡强(1978-),男,安徽萧县人,1999年在读硕士生,主要从事空间数据挖掘与地震数据集成等研究。

Re search on thetemporal variation of the multi-fractal of the earthquakes in North China

CAI Qiang, ZHOU Cheng-hu, PEI Tao, HAN Zhi-jun, WANG Min, QIN Cheng-zhi   

  1. State Key Laboratory of Resources and Environment Information System, CAS, Beijing 100101, China
  • Received:2001-07-04 Revised:2001-09-17 Online:2002-04-30 Published:2021-12-21

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摘要： 应用分形理论,采用扩充数盒子方法EBA对华北地区1960~ 1982年发生的地震时间分布进行了多重分形谱计算。结果表明,在这期间该地区的几次较强地震在分形谱上都有明显的反映,强震年份的分形谱发生较大幅度变化,正q区Dq 值下降,负q区Dq 值上升,具有一定的预报意义。文中进而计算了几次较强地震的地震序列(1966年邢台、1969年渤海、1975年海城、1976年唐山)的空间多重分形谱,研究其随时间的演化现象,表明强震前后分形谱变动幅度较大,震群型地震序列和主震型地震序列的分形谱呈现出不同的变化趋势。

关键词: 华北地震, 多重分形, 扩充数盒子法, 时空变化

Abstract: Applying fractal theory, using Enlarged Box Algorithm, the authors calculate the multi-fractal spectrums of thetem poral distribution of earthquakes in North China from 1960 to 1982. It is found that several earthquakes (suchas Tang shan 1976 earthquake) have all displayed themselves dramatically in the spectrums. In the years when the big earthquakes happen, Dq values of negativeq increase greatlyor Dq values of positiveqdecrease greatlyor both happen. The result may be useful for earthquake prediction. We also analy ze after shock sequences of the four great earthquakes (Xingtai 1966, Bohai 1969, Haicheng 1975, Tang shan 1976), calculate the multi-fractal spectrums of their spatial distribution which varies with time, finding that multi-fractal spectrums change greatly with in the earthquakesequence as time goes. Something meaningful has been found by com paring theperformance of the spectrums of the four earthquakesequences.

Key words: North China earthquake, Multi-fractal, Enlarged Box Algorithm, temporal and special change

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