2009年8月11日安达曼群岛Ms7.5地震热红外变化

摘要

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.%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.