2020年1月16日库车M_(S)5.6地震前兆异常初步分析  

PRECURSORY ANOMALY ANALYSIS OF KUCHE M_(S)5.6 EARTHQUAKE ON JANUARY 16,2020

作　　者：张治广[1] 钱才 邢喜民 木拉提江·阿不来提 ZHANG Zhi-guang;QIAN Cai;XING Xi-min;Mulatijiang·Abulaiti(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China;Xinjiang institute of engineering,Urumqi 830023,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 [2]新疆工程学院,新疆乌鲁木齐830023

出　　处：《内陆地震》2022年第1期9-16,共8页Inland Earthquake

基　　金：地震科技星火计划项目(XH19049);中国地震局震情跟踪青年课题(2021010223)。

摘　　要：利用常用的形态分析法,研究2020年1月16日库车M_(S)5.6地震的前兆异常变化特征。结果显示:地震发生前,震中250 km范围内共6套观测仪器出现了7项前兆异常变化,其中背景异常2项,中短期异常5项,背景异常特征主要表现为震前数据发生趋势转折变化,中短期异常特征主要表现为数据年变幅度的改变、倾斜方向改变和速率的快速变化等。最后,对异常的时间进程和空间分布特征进行分析,异常项主要位于震中距为225 km的库尔勒地震台,对应中短期异常数量在2019年12月以后达到峰值5项,地震发生在异常结束后的阶段。通过对库车M_(S)5.6地震震前前兆异常特征进行分析,以便为该区域未来的地震预测提供一定的科学依据。Using morphological analysis method,the precursory anomaly variation characteristics of Kuqa M_(S)5.6 earthquake on January 16,2020 were studied.The results showed that before the earthquake,7 precursory anomalies occurred in 6 sets of observation instruments within 250 km of the epicenter,including 2 background anomalies and 5 medium and short-term anomalies.The characteristics of background anomalies were mainly the trend turning changes of data before the earthquake,and the characteristics of medium and short-term anomalies were mainly the changes of annual variation amplitude,tilt direction and speed of data.In the end,the time course and spatial distribution characteristics of anomalies were analyzed.The anomaly items were mainly located at the Korla seismic station with an epicenter distance of 225 km.The number of corresponding medium and short-term anomalies reached peak 5 items after December 2019,and the earthquake recurred after the end of the anomaly.Through the analysis of precursory anomaly characteristics of Kuqa M_(S)5.6 earthquake,it provides a certain scientific basis for the future earthquake prediction in this area.

关 键 词：地震前兆 异常分析 数字化观测资料 库车M_(S)5.6地震 

分 类 号：P315.7[天文地球—地震学]