摘要
本文利用模糊分维公式计算了大同6.1级和5.8级地震前震中及附近地区前兆观测资料的模糊维数。结果表明,震前前兆观测资料的模糊维数明显下降,且震中位于降维最大的地区附近。唐山7.8级地震前,短水准观测资料也有类似的情况。
By using the formula of fuzzy fractal dimenion, the values of fuzzy, fractal dimension of the observational data of precursors in epicentral region and its vicinity before the M6. 1 and M5.8 Datong earthquakes have been calculated and analysed. The results obtained show that there exist obvious decreases of fuzzy fractal dimension before the earthquakes, and the epicenters were ioeated in the vicinity of the region where the decreases of fuzzy fraetal dimension were most strong. The similar phenomena were obtained in the short-base leveling data before the Tangshan M7.8 earth quake.
出处
《西北地震学报》
CSCD
1992年第3期13-20,共8页
Northwestern Seismological Journal
基金
地震科学联合基金会资助
