地震工程学报Issue(4)：1007-1012,6.DOI:10.3969/j.issn.1000-0844.2015.04.1007
2014年10月7日云南景谷MS6.6地震热红外异常
Thermal Infrared Anomaly Occurring before the Jinggu, Yunnan MS6.6 Earthquake on October 7,2014
李青梅 1张元生 2吕俊强 1任家琪 1张丽峰 2张璇2
作者信息
- 1. 宁夏地震局，宁夏 银川 750001
- 2. 中国地震局兰州地震研究所，甘肃 兰州 730000
- 折叠
摘要
Abstract
To analyze the thermal infrared anomaly occurring before the Jinggu,Yunnan MS6.6 earthquake in China on October 7,2014,remotely sensed infrared brightness temperature data obtained from the Chinese geostationary meteorological satellite FY-2C/2E is used for analysis. The wavelet transform is used to determine variations and progression of changes in the power spectrum.Thermal infrared anomalies are analyzed using a temporal evolution diagram of the earthquake and a timing curve of the average brightness temperature.Processing and analysis results show that in early August 2014,thermal anomalies occurring before the earthquake had obvious spatial and temporal characteristics.The epicenter and its surrounding area show thermal infrared anomalies that spread over time in a certain direction throughout the tectonic stress field with a sharp increase in the amplitude.On around August 30th,the anomalous amplitude reached a maximum,which persisted for almost one month at a maximum value of more than 14 times the average.The earthquake occurred 45 days after the appearance of the maximum value.Case analysis and history determines that the abnormal thermal evolution firstly appeared,enhanced before shrinking,and finally disappeared.The results of this study are consistent with those of other earthquakes and are considered to be related to the geological structure and underground environment of the epicenter.This study focuses on the thermal-infrared abnormity,its evolu-tion,and features in relation to the formation of earthquakes and delivers a new understanding of the relationship between thermal anomalies and earthquake elements.Abnormal seismic thermal infrared characteristics are noted and identified and can be used as criteria for identifying subse-quent seismic thermal anomalies.The thermal infrared anomaly characteristics of this earthquake are both remarkable and easy to identify and can be used as in the recognition of seismic thermal anomalies.However,the thermal infrared anomaly characteristics also have its own short board, that is it cannot identify and judge the three elements of earthquake well.In summary,the results of this study can be used in conjunction with future studies to further validate the effect of satel-lite thermal infrared anomalies in the prediction of earthquakes.关键词
云南景谷MS6.6地震/静止卫星/热红外遥感/相对功率谱/亮温变化Key words
Jinggu MS6. 6 earthquake in Yunnan Province/geostationary satellite/thermal infra-red remote sensing/relative power spectrum/brightness temperature change分类
天文与地球科学引用本文复制引用
李青梅,张元生,吕俊强,任家琪,张丽峰,张璇..2014年10月7日云南景谷MS6.6地震热红外异常[J].地震工程学报,2015,(4):1007-1012,6.
