选用静止卫星红外遥感亮温资料，对2011年9月18日印度锡金里氏6．8级地震热红外资料进行研究，并对比分析该地区2006年以来热红外异常变化，研究结果发现该区大地震之前存在明显的异常变化，相对功率谱最大值达到12，震前42天出现异常，9月15日前后异常幅度达到最大值，显示出明显区域性特征。%By using the satellite IR brightness temperature sensing data, the earthquake thermal infrared data of India＇s Sikkim ML6.8 earthquake on September 18,2011 has been studied. Based on the comparative analysis among the thermal infrared abnormal changes of this region since 2006, it was found that there are significant abnormal changes before the earthquake and the relative power spectral maximum is up to 12. The abnormalities appeared 42 days before the earthquake. It has reached the maximum after September 15, which showed a clear regional characteristic of abnormalities.
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