| 强震中波红外异常特征研究 |
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| 引用本文： | 张丽峰,郭晓,张璇,魏从信,秦满忠.强震中波红外异常特征研究[J].西北地震学报,2016,38(6):977-984. |
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| 作者姓名： | 张丽峰 郭晓 张璇 魏从信 秦满忠 |
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| 作者单位： | 中国地震局兰州地震研究所, 甘肃 兰州 730000,中国地震局兰州地震研究所, 甘肃 兰州 730000;兰州地球物理国家野外科学观测研究站, 甘肃 兰州 730000,中国地震局兰州地震研究所, 甘肃 兰州 730000;兰州地球物理国家野外科学观测研究站, 甘肃 兰州 730000,中国地震局兰州地震研究所, 甘肃 兰州 730000;兰州地球物理国家野外科学观测研究站, 甘肃 兰州 730000,中国地震局兰州地震研究所, 甘肃 兰州 730000;兰州地球物理国家野外科学观测研究站, 甘肃 兰州 730000 |
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| 基金项目： | 高分遥感地震监测与应急应用示范系统（一期）（31~Y30B09~9001~13/15） |
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| 摘 要： | 为了研究强震中波红外热辐射异常变化特征,以风云卫星中波红外资料为基础数据,应用小波变换和功率谱估计方法对6次6.5~7.0级强震进行分析。结果表明:6次强震前3个月内均存在明显的中波红异常变化,功率谱异常偏离年均值和标准差值较大,其异常幅度可达8倍,持续时间为50~105天。异常变化特征具有强震短期预测指标意义,同时可对即将投入实用的高分辨率静止卫星中波红外资料在地震预测中的应用提供重要参考。
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| 关 键 词： | 强震 中波红外 异常特征 |
| 收稿时间： | 2016/5/8 0:00:00 |
Anomaly Characteristics of Medium-wave Infrared Data prior to Strong Earthquakes |
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| ZHANG Li-feng,GUO Xiao,ZHANG Xuan,WEI Cong-xin and QIN Man-zhong.Anomaly Characteristics of Medium-wave Infrared Data prior to Strong Earthquakes[J].Northwestern Seismological Journal,2016,38(6):977-984. |
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| Authors: | ZHANG Li-feng GUO Xiao ZHANG Xuan WEI Cong-xin and QIN Man-zhong |
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| Institution: | Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China,Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Lanzhou National Observatory of Geophysics, CEA, Lanzhou 730000, Gansu, China,Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Lanzhou National Observatory of Geophysics, CEA, Lanzhou 730000, Gansu, China,Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Lanzhou National Observatory of Geophysics, CEA, Lanzhou 730000, Gansu, China and Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Lanzhou National Observatory of Geophysics, CEA, Lanzhou 730000, Gansu, China |
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| Abstract: | In this study, we investigated the medium-wave infrared anomaly characteristics prior to the occurrence of strong earthquakes. We use wavelet transformation and relative power spectrum estimation methods to analyze medium-wave infrared data from an FY stationary meteorological satellite prior to the occurrence of six strong earthquakes with magnitudes of 6.5~7.0. The results show that obvious medium-wave infrared anomalies occurred within three months of the six strong earthquakes. In addition, the relative power spectrum value greatly deviated from the annual average and standard deviation in a 50~105 day period. The anomalies of the Xinyuan-Hejing and Lushan earthquakes appeared in a brief period prior to the two earthquakes and continued until they had stopped. In the brief period before the earthquakes, the power spectrum anomaly values increased by a factor of more than eight. The main evolution and peak of the anomalies of the remaining four earthquakes all appeared prior to the earthquakes and their power spectrum anomaly values also increased by a factor of more than eight. The corresponding areas where the anomaly values reached their peaks ranged from several thousands to tens of thousands of square kilometers, and the corresponding periods ranged from 11 to 32 days. The relative power spectrum value deviates from the annual average and standard deviation and the period of deviation is more than 50 days. All these characteristics can be easily recognized and used to expediently predict earthquakes. Moreover, the use of high-resolution medium-wave infrared data from key earthquake hazardous areas can provide a reference for seismic prediction. |
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| Keywords: | strong earthquakes medium-wave infrared anomaly characteristics |
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