天水麦积磁偏角在我国西部地区几次强震前异常特征及震例分析  

Abnormal Feature and Earthquake Cases of Magnetic Declination at Maiji Area of Tianshui City Before Several Strong Earthquakes in The Western Region of China

作　　者：孟维斌 王建荣 汤晓昌 李旭升 

机构地区：[1]天水市地震局,甘肃天水741000 [2]天水市麦积区赵崖地震宏观骨干观测点,甘肃天水741025 [3]甘肃省地震局平凉中心地震台,甘肃平凉744000

出　　处：《华南地震》2016年第4期58-64,共7页South China Journal of Seismology

基　　金：甘肃省地震局地震科技发展基金野外站基金(2014Y02)

摘　　要：介绍了2008年以来天水麦积磁偏角在我国西部几次强震前的异常特征,认为磁偏角在异常期间出现转折,可视为临震信号。如果异常时间长、异常幅度大、震级就大,震中距也较近;反之震级较小或震中距较远。结合地下水动态异常变化,对麦积磁偏角异常进行佐证,最后对研究过程中的认识进行探讨。This paper introduced the abnormal feature of magnetic declination since 2008 at Maiji Area of Tianshui City before several strong earthquakes in the western region of China. If data is stable, easily identify anomaly, the test items of earthquake short-ten monitoring can play a certain role. It is considered that the time of anomaly, the magnitude of the anomaly, the magnitude of the magnitude is larger, and the distance from the epicenter is also relatively close; Otherwise, the magnitude is smaller or the distance of the epicenter is far away. Combining the dynamic anomalies of groundwater change, this paper proved theanomaly of magnetic declination at Maiji Area of Tianshui City, and discussed the understanding during the research process.

关 键 词：磁偏角 异常特征 强震异常 地下水动态 

分 类 号：P315.721[天文地球—地震学]