| 2018年2月台湾花莲震群热红外遥感亮温异常分析 |
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| 引用本文： | 魏从信,卢晓春,成芳,惠少兴.2018年2月台湾花莲震群热红外遥感亮温异常分析[J].西北地震学报,2020,42(3):665-670. |
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| 作者姓名： | 魏从信 卢晓春 成芳 惠少兴 |
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| 作者单位： | 中国科学院国家授时中心, 陕西 西安 710600;中国科学院大学, 北京 100049;陕西省地震局, 陕西 西安 710068 |
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| 基金项目： | 中国地震局预测研究所基本科研业务专项（2015IESLZ02）；陕西省地震局启航与创新基金（QC201824） |
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| 摘 要： | 应用中国静止气象卫星FY-2G的TBB产品为基础数据，针对2018年2月上旬台湾花莲附近海域震群前出现在震中及附近区域的显著热红外异常，运用小波变换和相对功率谱法进行异常提取和资料分析。结果表明：花莲震群热红外异常范围主要分布在震中SW区域，震前约8个月出现功率谱增强现象，随时间推移，异常范围延纵谷断裂带逐渐扩大，持续近2个月，最大异常幅度超过14。
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| 关 键 词： | 花莲震群 热红外亮温 相对功率谱 |
| 收稿时间： | 2019/10/20 0:00:00 |
Anomalies of Thermal Infrared Brightness Temperature Beforethe Hualien, Taiwan Earthquake Swarm on February 2018 |
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| WEI Congixn,LU Xiaochun,CHENG Fang,HUI Shaoxing.Anomalies of Thermal Infrared Brightness Temperature Beforethe Hualien, Taiwan Earthquake Swarm on February 2018[J].Northwestern Seismological Journal,2020,42(3):665-670. |
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| Authors: | WEI Congixn LU Xiaochun CHENG Fang HUI Shaoxing |
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| Institution: | National Time Service Center, Chinese Academy of Science, Xi''an 710600, Shaanxi, China;University of Chinese Academy of Sciences, Beijing 100049, China; Shaanxi Earthquake Agency, China Earthquake Administration, Xi''an 710068, Shaanxi, China |
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| Abstract: | To resolve the obvious thermal infrared anomalies before the Hualien, Taiwan earthquake swarm on early February 2018, the TBB data of the national geostationary meteorological satellite FY-2G were collated in this study, and the anomalies were analyzed and extracted using the wavelet transform and relative power spectrum. Results showed that the thermal infrared anomaly range of the Hualien, Taiwan earthquake swarm was mainly distributed in the southwestern part of the epicenter area, and the phenomenon of power spectrum enhancement occurred approximately 8 months before the earthquake. With time, the abnormal range extended, and the longitudinal valley fault zone expanded gradually within approximately 2 months, with the largest amplitude exceeding 14. |
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| Keywords: | Hualien earthquake swarm infrared infrared brightness temperature relative power spectrum |
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