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DOI	10.1016/j.rse.2023.113815
	Pre-earthquake MBT anomalies in the Central and Eastern Qinghai-Tibet Plateau and their association to earthquakes
	Liu, Shanjun; Cui, Yi; Wei, Lianhuan; Liu, Wenfang; Ji, Meiyi
发表日期	2023
ISSN	0034-4257
EISSN	1879-0704
卷号	298
英文摘要	Thermal anomalies prior to large and hazardous earthquakes have been extensively detected by thermal infrared and microwave remote sensing techniques. However, few of the current research focuses on long-term tracking of the thermal anomalies for decades and their earthquake prediction potential in a seismically active area. Targeting at exploiting the association of thermal anomalies to earthquakes in terms of time, spatial patterns and magnitudes, comprehensive statistical analysis on the pre-earthquake microwave brightness temperature (MBT) anomalies of 103 destructive earthquakes with Ms. >= 5.0 in the Central and Eastern Qinghai-Tibet Plateau (90 degrees E - 102 degrees E, 28 degrees N - 38 degrees N) is conducted. To detect robust pre-earthquake thermal anomalies buried by the complex background and frequently variant meteorological noise, we propose a wavelet-based two-step difference (WTSD) approach which incorporates hierarchical clustering and wavelet decomposition, adopting it on the 17 years' microwave data collected by AMSR-E and AMSR-2 sensors. Interestingly, an NE trending MBT increase stripe has been repeatedly occurring prior to 60 of the 103 earthquakes (accounting for 58.25%). Then, we conduct comprehensive statistics on the occurring time, spatial patterns and intensities of the MBT anomalies, and find them closely associated to seismic events with Ms. >= 5.0 occurred in the Bayan Har and Qiangtang blocks. And, the MBT anomaly stripe is spatially consistent with the NE trending extensional faults and geothermal fields in this study area. Furthermore, the possible source mechanism of the MBT anomalies is explored with rock loading microwave observation experiments, and possible physical models suggested by predecessors are also discussed. On this basis, we discuss the relationship between the pre-earthquake MBT anomalies and extensional faults, and speculate the MBT anomalies are probably caused by intensified extrusion of the Indian plate to the Eurasian plate and the increased crustal stress, which indicates their significant potential as earthquake precursors in the Central and Eastern Qinghai-Tibet Plateau.
关键词	Pre -earthquake thermal anomalies Microwave brightness temperature Hierarchical clustering Wavelet -based two-step difference method Earthquake prediction Qinghai -Tibet Plateau
英文关键词	MICROWAVE BRIGHTNESS TEMPERATURE; ROBUST SATELLITE TECHNIQUES; MOMENT TENSOR SOLUTIONS; CRUSTAL DEFORMATION; WENCHUAN EARTHQUAKE; RADIATION; SEISMICITY; SYSTEM; FEATURES; SIGNALS
WOS研究方向	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001088518500001
来源期刊	REMOTE SENSING OF ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282840
作者单位	Northeastern University - China
推荐引用方式 GB/T 7714	Liu, Shanjun,Cui, Yi,Wei, Lianhuan,et al. Pre-earthquake MBT anomalies in the Central and Eastern Qinghai-Tibet Plateau and their association to earthquakes[J],2023,298.
APA	Liu, Shanjun,Cui, Yi,Wei, Lianhuan,Liu, Wenfang,&Ji, Meiyi.(2023).Pre-earthquake MBT anomalies in the Central and Eastern Qinghai-Tibet Plateau and their association to earthquakes.REMOTE SENSING OF ENVIRONMENT,298.
MLA	Liu, Shanjun,et al."Pre-earthquake MBT anomalies in the Central and Eastern Qinghai-Tibet Plateau and their association to earthquakes".REMOTE SENSING OF ENVIRONMENT 298(2023).