Analysis of Thermal Infrared Anomalies for the April 16, 2013 MW7.8 of Khash, Iran Earthquake |
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| Authors: | Wang Ying Zhang Yuansheng and Wei Congxin |
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| Institution: | Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China,Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China and Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China |
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| Abstract: | After using the "Time-Frequency Relative Power Spectrum" (T-F RPS) method based on the China Geostationary Meteorological Satellite (FY-2C/FY-2E) infrared remote sensing brightness temperature data processing, we rapidly and accurately extracted and identified pre-earthquake thermal infrared anomalies for the April 16, 2013 MW7.8 of Khash, Iran Earthquake. Spatial evolution of anomalies showed the distribution and process. The anomalies were mainly distributed in the east of Khash,Iran.The characteristics of process and distribution presented X-Type model of NE and near NS strip which relates to the geological structure of this region. The epicenter was located near the intersection region of the X-Type abnormal migration process. Besides, the results of time series of anomalies showed that, the duration was more than 40 days and the maximum amplitude was about 18 times. The earthquake occurred 20 days after the abnormal maximum amplitude which appeared on March 26, 2013. |
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| Keywords: | Satellite remote sensing Strong earthquake Thermal infrared brightness temperature Pre-earthquake thermal anomaly Time-Frequency spectrum |
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