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利用中国静止气象卫星FY-2E/G热红外亮温资料,采用小波变换和相对功率谱法对2016-08-24缅甸M_S6.9地震震前热红外资料进行分析。研究表明,地震震前存在显著的亮温变化,其热异常现象具体特征为:1)在2016-04-26开始出现热异常,相较以往震例表现出异常凸显、出现时间早且持续时间久的特点;2)异常区的时移性,该次异常区范围随时间推移逐渐扩大,至震前2个月左右异常面积达到最大,随后逐渐衰减直至完全消失;3)功率谱信息表现出增强的特征,异常持续时间在50d以上,特征周期为16d,最大相对变化率大于16倍。
Based on FY-2E / G thermal infrared brightness temperature data of Chinese stationary weather satellite, the thermal infrared data of the M_S6.9 earthquake in Myanmar before 2016-08-24 were analyzed by wavelet transform and relative power spectrum. The study shows that there is a significant change of bright temperature before the earthquake, and its thermal anomalies are characterized by: 1) Thermal anomalies begin to appear on April 26, 2016, which show anomalous prominence compared with previous earthquakes, with early appearance and duration Long time; 2) the time-shift of the anomalous zone, the scope of this anomalous zone gradually expanded over time, reached the maximum at about 2 months before the earthquake and then gradually decayed until it completely disappeared; 3) the power spectrum information showed The enhanced features, abnormal duration of more than 50d, the characteristic period of 16d, the maximum relative rate of change greater than 16 times.