2009年8月11日安达曼群岛M_S7.5地震热红外变化  

Thermal-Infrared Variation of M_S7.5 Andaman Islands Earthquake on August 11,2009

作　　者：魏从信[1] 张元生[1,2] 惠少兴[1] 

机构地区：[1]中国地震局兰州地震研究所,兰州730000 [2]中国地震局地震预测研究所兰州创新基地,兰州730000

出　　处：《地震研究》2011年第2期153-157,255,共5页Journal of Seismological Research

基　　金：中国地震局地震预测研究所2009年度基本科研业务专项(2009A79)资助

摘　　要：应用中国静止气象卫星FY-2C红外遥感资料对2009年8月11日安达曼群岛MS7.5地震以及近年在震中（14.21°N,92.84°E）及周围区域（5°~24°N,82°~102°E）发生的多次强震进行了研究,结果表明：MS7.5地震发生前约两个月震中以南区域开始出现热红外异常,异常区范围随时间逐渐扩大,至震前约20天异常面积达到最大,随后逐渐缩小,震后5天异常消失;区域内系列强震热红外异常呈现为震级大、热异常峰值大等特征。Using the infrared remote-sensing data of brightness temperature got from Chinese geostationary meteorological satellite,FY-2C,we analyze the thermal-infrared anomalous variation of the MS7.5 Andaman Islands earthquake occurred on August 11,2009,and other strong earthquakes in the adjacent areas（5°-24° N,82°-102° E）of its epicenter in recent years.We find that,in the south region of the epicenter,the thermal-infrared anomalies began to appear about two months before the earthquake.Then the anomalous range gradually broadened in the early stage of the seimogenic process.The anomalous area reached up to maximum about 20 days prior to the earthquake,then the anomalous range shrunk abruptly.About 5 days after the earthquake,the anomaly disappeared.Besides,a series of strong earthquakes in the same region also displayed the characteristics of thermal-infrared anomalies.

关 键 词：卫星红外遥感 强震 热红外异常 小波变换 相对功率谱 安达曼群岛地震 

分 类 号：P631.7[天文地球—地质矿产勘探]