豫01井地下水位模糊分维值的变化与地震的关系  

RELATIONSHIP BETWEEN VARIATION OF THE FUZZY FRACTAL VALUE OF THE UNDERGROUND WATER LEVEL IN YU 01 WELL AND EARTHQUAKE

作　　者：郭德科[1] 吴学瑜[1] 赵欣荣 

机构地区：[1]濮阳市地震台,河南濮阳457000 [2]范县地震办公室,河南范县457500

出　　处：《西北地震学报》2002年第2期174-177,共4页Northwestern Seismological Journal

摘　　要：采用了模糊集理论与分形理论相结合的模糊分维方法 ,计算了河南范县豫 0 1井水位动态的模糊分维值 ,并分析了与 1 981年河北宁晋MS5.8、1 983年山东菏泽MS5.9、1 985年河北任县MS5.0地震的关系 .结果显示 ,模糊分维值在这 3次地震前都明显地出现了小于 0 .75的降维低值异常特征 .且震级越大 ,震中距越小 ,异常时间越长 ;Adopting the fuzzy fractal method which combines fuzzy set theory and fractal theory,the fuzzy fractal values of dynamic water level in yu 01 well,Fanxian county,Henan Province,are calculated,and the relationship between the fuzzy fractal value and three earthquakes (Ningjin M S5.8 in 1981,Heze M S5.9 in 1983,and Renxian M S5.0 in 1985) is analysed.The result shows an abnormal characteristic that the fuzzy fractal value fell down to less than 0.75 apparently before three earthquakes,and the larger the degree of earthquake is and the smaller the epicentral distance is,the longer the time of abnormal characteristic last.

关 键 词：模糊分维 水位异常 豫01井 

分 类 号：P315.723[天文地球—地震学]