德令哈6.6级地震前甘肃地区前兆异常的初步分析  

ANALYSIS ON PRECURSORY ANOMALIES IN GANSU PROVINCE BEFORE DELINGHA EARTHQUAKE WITH Ms6.6

作　　者：燕明芝[1] 李晓峰[1] 张昱[1] 郑卫平[1] 张苏平[1] 张小美[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》2003年第3期15-26,共12页Plateau Earthquake Research

摘　　要：利用甘肃地区12个观测台包括三大学科(地电,水氡、气氡、水位,应力)共16个测项的观测资料,经去倾付氏分析及用日均值、5日均值、月均值等方法进行处理分析。分析发现,在2003年4月17日青海德令哈6 6级地震前,这些台项出现了较多远场前兆异常,并对6 6级地震与这些异常进行了初步分析。Utilizing the methods of FFT with eliminating dip,daily mean value,five-day mean value and monthly mean value,the observation data of 16 observatory methods of 12 observation stations in Gansu area including three subjects(earth electricity,hydrochemistry and stress)are analyzed in the paper.The results show that many precursory anomalies in the far-field appeared before Delingha earthquake with Ms6.6 on Apr.17,2003.The relationship between these anomalies and strong earthquakes is also discussed.

关 键 词：甘肃 地电 水化 应力 远场前兆异常 德令哈6.6级地震 

分 类 号：P315.72[天文地球—地震学]