2020年1月19日新疆伽师M_(S)6.4地震前地球物理定点观测异常特征分析  

ANOMALY CHARACTERISTICS ANALYSIS OF FIXED OBSERVATION IN GEOPHYSICS BEFORE XINJIANG JIASHI M_(S)6.4 EARTHQUAKE ON JANUARY 19,2020

作　　者：赵彬彬[1] 高歌[1] 艾萨·伊斯马伊力 ZHAO Bin-bin;GAO Ge;Aisa Yisimayili(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2022年第1期1-8,共8页Inland Earthquake

基　　金：地震预测开放基金(2021EFOF08).

摘　　要：利用形态分析法和速率分析法,检验2020年1月19日新疆伽师M_(S)6.4地震前出现的地球物理定点观测异常。结果表明:伽师地震前共存在4项中长期异常,包括3项背景异常和1项中期异常,其中仅有乌恰钻孔倾斜中期异常对应本次伽师M_(S)6.4地震。统计显示,在本次地震前,喀什地磁垂直分量拟合差值首次出现超过2倍均方差的背景异常,异常出现后,台站周边发生多次M_(S)≥5.0以上地震;乌恰钻孔倾斜的震例均发生在异常结束后2个月左右,且异常持续时间越长,对应地震的震级越大。Using morphological analysis method and velocity analysis method study the anomaly characteristics of fixed observation in geophysics before Jiashi M_(S)6.4 earthquake on January 19,2020.The results show that there are four Medium-long term anomalies before Jiashi M_(S)6.4 earthquake,include three Long-term anomalies and one Medium-term anomaly;only Wuqia borehole tilt medium-term anomaly can be accounted to Jiashi M _(S)6.4 earthquake.Statistics shows that there are many M_(S)≥5.0 earthquakes after Kashgar vertical component of geomagnetism anomaly.The earthquakes of Wuqia borehole tilt occurred about 2 months after the end of the anomaly,and the longer the duration of the anomaly,the greater the magnitude of the corresponding earthquake.

关 键 词：伽师M_(S)6.4地震 地球物理场 定点观测 异常特征 

分 类 号：P315.7[天文地球—地震学]