2024年罗甸震群热异常变化特征分析

1.海南省地震局,海口 570101;2.甘肃省地震局,兰州 730030;3.贵州省地震局,贵阳 550001

罗甸震群;热红外异常;相对功率谱法

Analysis of Thermal Anomaly Characteristics of Luodian Earthquake Swarm in 2024
GUO Yuqin1,ZHANG Yuansheng2,WANG Liyan3,LIU Yang1,ZHENG Lidong1

1.Hainan Earthquake Agency , Haikou 570101, China;2.Gansu Earthquake Agency , Lanzhou 730030, China;3.Guizhou Earthquake Agency , Guiyang 550001, China

Luodian earthquake swarm;Thermal infrared anomaly;Relative power spectrum method

DOI: 10.13512/j.hndz.2025.01.05

备注

使用中国静止气象卫星FY-2G红外遥感亮温产品为基础数据,运用小波变换和相对功率谱法进行热红外异常提取。对2024年6月下旬贵州罗甸震群进行了热红外异常分析,结果表明:6月14日在威宁—水城断裂东南端、巴马—博白、南丹—河池断裂中间出现北北西向展布的热红外异常,其相对功率谱最大值超过16倍,异常显著,并结合该震群的8次3级以上地震震源机制解分析发现,地震主破裂方向与热异常特征具有一致性。
The thermal infrared anomaly was extracted by using wavelet transform and relative power spectrum based on the brightness temperature product of Chinese geostationary meteorological satellite FY-2G infrared remote sensing. A thermal infrared anomaly analysis of the Luodian earthquake swarm in Guizhou Province in late June of 2024 was conducted,and the results show that on June 14,The NNW-trending thermal infrared anomaly in the southeastern tip of the Weining Yi,Hui,and Miao Autonomous County-Shuicheng fault,the Bama-Bobai fault, and the Nandan-Hechi fault, with the maximum relative power spectrum more than 16 times, and the anomaly is significant. Based on the analysis of the focal mechanism solutions of eight earthquakes with M≥3,it is found that the main rupture direction of the earthquake is consistent with the characteristics of thermal anomaly.
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