强震前后广义地震应变释放过程的丛集特征

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

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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

Abstract

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

CLC Number:

P315.5

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

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