Welcome to EARTHQUAKE,

EARTHQUAKE ›› 2022, Vol. 42 ›› Issue (3): 37-51.doi: 10.12196/j.issn.1000-3274.2022.03.003

Previous Articles     Next Articles

Analysis of Seismic Thermal Anomaly in Yutian Area of Xinjiang, China Based on Multi-Source Remote Sensing Data of Different Spatial and Temporal Scales

DU Chen1, SUN Ke1,2   

  1. 1. Institute of Earthquake Forecasting, CEA, Beijing 100036, China;
    2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, CEA, Beijing 100029, China
  • Received:2021-07-15 Revised:2021-11-15 Online:2022-07-31 Published:2023-03-29

Abstract: Based on the MODIS land surface temperature data and NOAA outgoing longwave radiation data of 5 earthquakes with MS5.0 or above in Yutian area since 2000, the characteristics of thermal infrared anomalies before earthquakes are extracted and analyzed from different time and space scales. The results show that obvious thermal anomalies are extracted from the two kinds of data of the five earthquakes, and the extraction results of the two data anomalies have a certain temporal and spatial correlation. Based on the above analysis results of thermal infrared characteristics of different spatial and temporal scales, an multi spatial and temporal scale anomaly discrimination method is summarized and put forward. Based on this method, the thermal infrared data of the field and its surrounding areas from 2018 to 2020 are scanned, and the retrospective test application of thermal infrared anomalies of earthquakes above MS5.0 is carried out. A total of 19 anomalies are detected, including 12 corresponding earthquakes, 7 false reports. In addition, there are 7 missed reports. The comprehensive extraction of thermal infrared anomaly features from multi-source remote sensing data of different spatial and temporal scales can reduce the interference of environmental factors and extract effective thermal anomaly features. The above research results provide support for the identification of seismic thermal infrared anomalies in multi temporal and spatial scales.

Key words: MODIS, OLR, Yutian earthquake, Thermal anomaly, RST, Retrospective test

CLC Number: