祁连—西秦岭地震带流体异常震例分析  

Research on earthquake cases based on underground fluid in the Qilian-West Qinling seismic belt

作　　者：赵小茂[1] 窦玛丽[1] 张国强[1] 王新[1] 方炜[1] 

机构地区：[1]陕西省地震局,中国西安710068

出　　处：《地震地磁观测与研究》2016年第5期72-77,共6页Seismological and Geomagnetic Observation and Research

基　　金：2015年度震情跟踪定向工作任务(2015010410);2016-2018年陕西省地震局启创基金

摘　　要：总结1980—2010年祁连—西秦岭地震带地下流体有关震例,对地下流体前兆异常特征进行统计。发现:祁连—西秦岭地震带地震异常以原始曲线方法提取出的高值、化学量、中期异常为主;流体异常持续时间与震中距成负相关关系,即异常最先出现在与地震较近的台站。In this study, we attempt to statistically investigate and analyze the precursory characteristicsof underground fluid base on researches of earthquake cases associated with underground fluidof the Qilian-West Qinling seismic belt from the year 1980 to 2010. The results reveal that theearthquake precursors are mainly high values, chemical amounts, and middle-term anomalies,which are retrieved from raw time series records. Meanwhile, statistical results of precursory timeof underground fluid show that precursory time scale are negatively related to epicentral distance,namely precursors always firstly occurred at geodynamic observatories which are closest to theepicenters.

关 键 词：祁连-西秦岭地震带 地下流体 震例 统计研究 

分 类 号：P315.72[天文地球—地震学]