甘东南甘青川交界地区中强地震前中等地震活动共性特征研究  

STUDY ON MUTUAL FEATURES OF MIDDLE EARTHQUAKES ACTIVITIES BEFORE MIDDLE-STRONG EARTHQUAKES IN EAST-SOUTHERN GANSU PROVINCE AND ITS NEIGHBOR REGIONS

作　　者：杨立明[1] 张勇[1] 张富芳 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000 [2]甘肃省天祝县地震局,甘肃天祝733200

出　　处：《高原地震》2002年第3期1-8,共8页Plateau Earthquake Research

摘　　要：分析研究了 1970年以来甘东南甘青川交界地区Ms≥ 5 0级地震前中小地震时空演化过程。结果指出 ,该区中强地震前地震活动在时、空、强等方面存在较为广泛的共性特征 ,对区域震情判定。The evolution in spatio-temporal of middle-small earthquakes before ones with Ms≥5.0 in east-southern Gansu province and its neighbor regions since 1970 have been studied.The results show that the mutual features exist aboardly in spacial,temporal and intensity before the main shock,and they have a practice value for analysis and diagnosis in local earthquake prediction.

关 键 词：共性特征 中强地震 地震预报 甘肃 青海 四川 地震活动性 地震危险性 

分 类 号：P315.5[天文地球—地震学]