地震研究

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M_S7.5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:M_S7.5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 M_S7.5 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.

引言
1 资料处理
2 资料处理结果
3 结论与讨论

图1 安达曼群岛地震定位结果(中国地震信息网,2009)<br/>Fig.1 Location of the MS 7.5 Andaman Islands Earthquake(Based on the China Earthquake Information Network)

图1 安达曼群岛地震定位结果(中国地震信息网,2009)
Fig.1 Location of the MS 7.5 Andaman Islands Earthquake(Based on the China Earthquake Information Network)

图2 安达曼群岛MS7.5地震前后热红外异常时间演化图(图中功率谱数据经过相对处理,故无量纲)<br/>Fig.2 Time evolution map of thermal infrared anomalies in the nearby area of MS7.5 earthquake's epicenter (The data of the Power spectrum in the chart has been processed relatively,so there is no dimension)

图2 安达曼群岛MS7.5地震前后热红外异常时间演化图(图中功率谱数据经过相对处理,故无量纲)
Fig.2 Time evolution map of thermal infrared anomalies in the nearby area of MS7.5 earthquake's epicenter (The data of the Power spectrum in the chart has been processed relatively,so there is no dimension)

图3 红外有效观测时段该区时间序列曲线(纵坐标为功率谱数据,经过相对处理,故无量纲; 研究区域范围:12.0°～12.5°N,91.5°～92°E)<br/>Fig.3 Time-series curves of infrared effective observation period in this area(The ordinate stands for the power spectrum,which has been processed relatively,so there is no dimension.Region:12.0°～12.5°N,91.5°～92°E)

图3 红外有效观测时段该区时间序列曲线(纵坐标为功率谱数据,经过相对处理,故无量纲; 研究区域范围:12.0°～12.5°N,91.5°～92°E)
Fig.3 Time-series curves of infrared effective observation period in this area(The ordinate stands for the power spectrum,which has been processed relatively,so there is no dimension.Region:12.0°～12.5°N,91.5°～92°E)

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备注

引言

1 资料处理

2 资料处理结果

3 结论与讨论

期刊信息