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《Earthquake》 2003-02
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Research on the clustering of generalized seismic strain release process before and after strong earthquake occurrence

CHEN Shi-jun, MA Li, WANG Li-feng, DAVID Harte ( 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)  
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.
【Key Words】: Wavelet transition Multifractal Generalized seismic strain release.
【Fund】: 国家自然科学基金(40074013);; 山东省地震局博士基金(2002)
【CateGory Index】: P315.5
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