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  2019,Vol.14no.4 ,page:846-853

Anomaly of Outgoing Long-wave Radiation before the M7.0 Jiuzhaigou Earthquake on August 8, 2017
Abstract:      This paper, using departure method, analyzes temporal-spatial characteristics of Outgoing Long-wave Radiation of the M7.0 Jiuzhaigou earthquake epicenter area (95.00°~110.00°E,25.00°N~45.00°N). The results show:firstly, there exist significantly enhanced abnormal areas of OLR field removing background value before the M7.0 Jiuzhaigou earthquake,whose strike is consistent with that of geologic structure; secondly, the four grid points adjacent to the epicenter of the M7.0 Jiuzhaigou earthquake have the same characteristics of the long-wave radiation time-series curve after removing the background changes, and their OLR values in July 2017 are significantly higher than ones in other months.
Author NameAffiliation
Dai Yong Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Gao Lixin Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Gegeng Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Chasi Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Liu Yongmei Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Pei Dongyang Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China 
Keywords:    M7.0 Jiuzhaigou earthquake  OLR  Departure method  Abnormal intensification
Received on:  June 08, 2019
2017年8月8日九寨沟7.0级地震长波辐射异常特征
摘要:    通过距平方法,研究2017年8月8日九寨沟7.0级地震前震中所在区域(95.00°—110.00°E,25.00°—45.00°N)长波辐射时空演化特征,研究结果表明:①2017年7月,去除背景之后的长波辐射场在震区附近出现显著增强现象,增强区域基本走向与地质构造走向一致,其主体区域沿着巴颜喀拉块体南缘边界带,重要分支横跨巴颜喀拉块体,直接延伸至九寨沟7.0级地震震中;②紧邻九寨沟7.0级地震震中的4个格点在去除背景变化后的长波辐射时序曲线变化特征基本一致,即在2017年7月出现显著大于其他月份的现象。
关  键  词:九寨沟7.0级地震  长波辐射  距平方法  异常增强
基金项目:中国地震局震情跟踪定向工作任务(2019020402);中国地震局地震科技星火计划项目(XH17010Y);中国地震局监测、预报、科研三结合提升性课题(3JH-201902002);内蒙古自治区地震局局长基金课题(2018YC03)
作者简介:戴勇,男,生于1981年。高级工程师。主要从事地震预测研究。E-mail:daiyong06@mails.ucas.ac.cn
引用本文格式:戴勇,高立新,格根,查斯,刘永梅,裴东洋.2017年8月8日九寨沟7.0级地震长波辐射异常特征[J].震灾防御技术英文版,2019,14(4):846-853  DOI:10.11899/zzfy20190416
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