震(前)兆远场异常与德令哈6.6级地震临震特征分析  

The analysis of short-term characteristic and precursor abnormality before the M_S6.6 Delingha, Qinghai earthquake

作　　者：燕明芝 白亚平 梅秀苹 姚军 李春燕 

机构地区：[1]甘肃省地震局,中国兰州730000

出　　处：《地震地磁观测与研究》2004年第3期14-23,共10页Seismological and Geomagnetic Observation and Research

摘　　要：简要叙述了 2 0 0 3年 4月 17日发生在青海德令哈 6 6级地震及异常台站概况。采用甘肃省内11个地电台共 6 1个测项 (其中电阻率 2 8个测项、自然电位 2 8个测项、大地电场 5个测项 )及地震活动空间扫描图像 (频度场、b值、GL值 )进行筛选 ,从中检索到了 15项异常指标。经对数据的处理与临震异常特征分析 ,结果表明 :震 (前 )兆异常信息的出现为 6 6级地震事件的发生提供了临震异常判据 ;这些异常判据也可为将来地震的预测预报提供一定的参考依据。We have studied the Apt. 17, 2003 M S6.6 Delingha, Qinghai earthquake and the seismic abnormality using the data of the geo-electricity recorded in the 11 stations with 61 measure methods (including 28 geo-risistivity methods, 28 potential methods, 5 geo-electric field methods) and of seismicity special distribution (including seismic frequency field, b, GL). We picked out 15 abnormal indexes. The result shows that the long-distance field anomalous information of the geo-risistivity and the seismicity are the characteristic of short term and critical before the M S6.6 event, and they are usfull can apply reliable foundation to the earthquake prediction.

关 键 词：德令哈6.6级地震 地震活动 地电 震(前)兆异常 

分 类 号：P315[天文地球—地震学]