A time-frequency analysis of the thermal radiation background anomalies caused by large earthquakes: A case study of the Wenchuan 8.0 earthquake

doi:10.1016/j.asr.2019.09.019

	A time-frequency analysis of the thermal radiation background anomalies caused by large earthquakes: A case study of the Wenchuan 8.0 earthquake
	Wei, Congxin 1,3,4; Lu Xiaochun 4; Zhang Yuansheng 3; Guo Yingxia 2; Wang Ying 3
刊名	ADVANCES IN SPACE RESEARCH
	2020
卷号	65 期号:1 页码:435-445
关键词	Remote sensing Temporal-spatial anomalies Wenchuan Ms 8.0 earthquake Minxian-Zhangxian Ms 6.6 earthquake Thermal radiation background
ISSN号	0273-1177
DOI	10.1016/j.asr.2019.09.019
英文摘要	Strong earthquakes have an impact on the regional thermal radiation background, which has been both observed and confirmed. This effect produces anomalies in the thermal radiation background (TRBA) and increases the difficulty of extracting a thermal radiation anomaly (TRA) that is associated with an earthquake occurring during the same time period. The extraction and identification of such anomalies has been ignored by previous studies. In this study, we investigate the time-frequency analysis (TFA) method, together with the wavelet filtering of the Daubechies method and the relative power spectrum analysis of the Fourier Welch method to extract and analyse the TRBA caused by the 2008 Wenchuan Ms 8.0 earthquake and the TRA of the 2013 Minxian-Zhangxian Ms 6.6 earthquake using data concerning the brightness temperature of a black body (TBB) from the Fengyun-2 series of geostationary meteorological satellites developed by China. The result showed that this method can effectively extract and analyse the TRBA caused by the Wenchuan earthquake and the TRA of the Minxian-Zhangxian earthquake form a complex background environment. Furthermore, we discussed the impact of the earthquake on the TRBA and segmented the process. The impact is mainly reflected by three aspects; the characteristic period of the TRBA changes, the TRBA occurs at the same time every year, which is identical to the time at which the earthquake anomaly occurred, and the impact process is in stages. We also summarized the correlation between the characteristic parameters of a TRA and the regional thermal radiation background, geography, and climatic factors. (C) 2019 Published by Elsevier Ltd on behalf of COSPAR.
资助项目	Institute of Earthquake Science, China Earthquake Administration[2015IESLZ02]
WOS关键词	SATELLITE ; TEMPERATURE ; RUPTURE
WOS研究方向	Engineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000509784600035
资助机构	Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration ; Institute of Earthquake Science, China Earthquake Administration
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/9592]
专题	国家授时中心_导航与通信研究室
通讯作者	Lu Xiaochun
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.China Earthquake Adm, Earthquake Adm Jiangsu Prov, Nanjing 210014, Peoples R China 3.China Earthquake Adm, Lanzhou Inst Seismol, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China
推荐引用方式 GB/T 7714	Wei, Congxin,Lu Xiaochun,Zhang Yuansheng,et al. A time-frequency analysis of the thermal radiation background anomalies caused by large earthquakes: A case study of the Wenchuan 8.0 earthquake[J]. ADVANCES IN SPACE RESEARCH,2020,65(1):435-445.
APA	Wei, Congxin,Lu Xiaochun,Zhang Yuansheng,Guo Yingxia,&Wang Ying.(2020).A time-frequency analysis of the thermal radiation background anomalies caused by large earthquakes: A case study of the Wenchuan 8.0 earthquake.ADVANCES IN SPACE RESEARCH,65(1),435-445.
MLA	Wei, Congxin,et al."A time-frequency analysis of the thermal radiation background anomalies caused by large earthquakes: A case study of the Wenchuan 8.0 earthquake".ADVANCES IN SPACE RESEARCH 65.1(2020):435-445.