苏门答腊2004、2005年两次大地震前后CO和O3遥感信息

Remote Sensing Anomalies of CO and O_3 Related to Two Giant Sumatra Earthquakes Occurred in 2004 and 2005

利用卫星遥感数据提取了苏门答腊2004年12月和2005年3月两次8级以上地震前后震中及其附近CO和O3总量随时间变化的信息,并讨论了CO、O3气体异常与两次大地震之间的关系。AIRS高光谱遥感数据信息提取结果表明,CO总量和O3总量分别在2004年12月26日Ms 8.9地震前约4个月和8个月出现了异常;在异常时段CO总量的标准偏差增大。CO总量与O3总量均在2005年3月28日Ms 8.6地震前约2个月出现异常。两次大地震前后遥感信息异常与地震活动对应较好,这可以归因为孕震应力场作用下地下气体的逸散及其与大气气体组分发生的化学反应。研究结果对利用卫星高光谱分辨率遥感数据提取地震气体地球化学异常信息及其在地震监测中的应用具有重要意义。

The anomalies of CO and O3and the two MS>8earthquakes occurred in Sumatra in December 2004and March 2005were correlated.The anomalous information of CO total column(abbreviated as COt)and total O3were extracted from the Atmospheric Infrared Sounder(AIRS)data.The calculated results of the hyperspectral remote sensing data showed that the anomalies of COtand total O3 were found 4 months and 8 months before the Ms 8.9earthquake of 26 December 2004,respectively.The standard deviations of COtincreased significantly when the anomalies of COtexisted.The anomalies of COtand total O3began to occur 2months before the Ms 8.6earthquake of 28 March 2005.The anomalies of COtand O3were well related to the earthquakes,which can be attributed to the degassing of the solid earth under action of tectonic stress at the epicenter region and vicinity,and the chemical reaction between the gases and the components in the atmosphere.The results favor monitoring and forecasting earthquake by using the hyperspectral remote sensing data.