岷县5.2级地震前兆异常分析  

ANALYSIS ON THE PRECURSORY ANOMALIES BEFORE MINXIAN 5.2 EARTHQUAKE

作　　者：徐辉[1] 白亚平[1] 康庆强[1] 姚军[1] 燕明芝[1] 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000

出　　处：《高原地震》2007年第3期25-28,共4页Plateau Earthquake Research

摘　　要：用兰州、天水、通渭、武都4台站地电数字化资料观测结果,对2003年11月13日在岷县发生的Ms5.2级地震进行分析,其结果表明,在该地震发生前地电前兆出现了多项短临异常,这些短临异常特征明显,从异常开始至结束,展现为时间短、幅度大、恢复快这一特点。可为地震短临预报提供重要的参考依据。Used digital observation data of geo - resistivity from l_anzhou, Tianshui, Tongwei and Wudu 4 stations, we analyze Minxian Ms 5.2 earthquake on Nov. 13,2003.The results show that there are multiple shortterm and impending precrusory anomalies before the earthquake. The characteristics of short - term and impending anomalies are obvious which display less time, sigificant extent and rapid recovery from the beginning to the end. These characteristics can contribute to the short - term and imminent earthquake predition.

关 键 词：地电前兆 数字化观测 电阻率 自然电位 异常特征 

分 类 号：P315.722[天文地球—地震学]