华南地区地震热异常变化特征分析  

Variation Characteristics of Seismic Thermal Anomaly in South China

作　　者：郭昱琴 张丽峰[2] 郑柯献 刘阳[1] 李冬雅 GUO Yuqin;ZHANG Lifeng;ZHENG Kexian;LIU Yang;LI Dongya(Hainan Earthquake Agency,Haikou 570101,China;Qinghai Earthquake Agency,Xining 810005,China)

机构地区：[1]海南省地震局,海口570101 [2]青海省地震局,西宁810005

出　　处：《华南地震》2024年第2期14-23,共10页South China Journal of Seismology

基　　金：中国地震局监测、预测、科研三结合课题(3JH-202401020);海南省地震局青年基金课题(HDKJ202203)。

摘　　要：利用数据库2006年以来的卫星热红外亮温资料,统计并研究华南沿海5级及海南邻近区域4级以上地震。研究结果表明:64.7%的地震在震前存在明显的热红外异常异常总体特征为出现—增加—极大值—减弱—消亡的过程,不同地震出现异常的对应周期不同,主要以第一对应周期为主,地震大多发生在异常达到峰值后两个月内。异常的最大幅值与震级没有正相关的关系,可能与震前几年是否出现过高值异常有关,是个相对值。Based on the satellite thermal infrared brightness temperature data since 2006,the earthquakes of ML5.0 along the South China coast and those above ML4.0 in the adjacent area of Hainan were analyzed.The results show that there are obvious thermal infrared anomalies in 64.7%of the earthquakes before the earthquake,which are characterized by the process of occurrence-increase-peak-attenuation-extinction.In addition,the correspond⁃ing occurrence period of anomalies in different earthquakes varies,dominated by the first corresponding period.Most of the earthquakes occur within two months after the anomaly reaches its peak.The maximum amplitude of the anomaly has no positive correlation with the magnitude of the earthquake and may be related to whether there was a high-value anomaly in the years before the earthquake,which is a relative value.

关 键 词：华南沿海 热红外异常 小波分析 异常事件 

分 类 号：P315.728[天文地球—地震学]