Analysis of Broadband Seismic Recordings of Landslide Using Empirical Green's Function

doi:10.1029/2018GL081448

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Analysis of Broadband Seismic Recordings of Landslide Using Empirical Green's Function
	Zhang, Zhen 1,2; He, Siming1,2,3
刊名	GEOPHYSICAL RESEARCH LETTERS
	2019-05-16
卷号	46 期号:9 页码:4628-4635
ISSN号	0094-8276
DOI	10.1029/2018GL081448
通讯作者	He, Siming(hsm@imde.ac.cn)
英文摘要	The 2010 Mount Meager landslide generated strong seismic waves. We used seismic signals generated by a smaller landslide that occurred within 2 min of the end of the main landslide as the empirical Green's function (EGF) with which to obtain landslide dynamics from high-frequency signals. We then obtained the apparent force-time function of the landslide based on the EGF by inverting the higher-frequency seismic signals. The apparent force-time function shows that the source material of the main landslide came from four collapses and that the second collapse involved multiple small collapses. We also used the EGF to simulate the vertical seismogram recorded at one station and found that the synthesized seismogram fits the response of the bulk mobilization of the sliding materials remarkably well. Our study demonstrates that the use of the EGF can significantly broaden quantitative insights into landslide dynamics. Plain Language Summary Seismic records reflect the effects of landslide dynamics and the path of seismic waves through the Earth. Because the calculation of the high-frequency component of the effect of a wave's path through the Earth requires a detailed characterization of the velocity and attenuation structure, the effects of landslide dynamics can only be estimated by inverting the long-period seismic signals. To study the high-frequency seismic signals generated from the Mount Meager landslide, we considered the seismic signals generated by a smaller landslide as the effects of the path of seismic waves. We used the seismic signals generated by the smaller landslide to simulate the signal generated by the main landslide to overcome the effects of a potential overlap in the frequency domain between signals from the bulk and those from smaller particles. Our results show that the seismic signals generated by a small landslide can be used to improve our understanding of those generated by the main landslide.
资助项目	Major Program of the National Natural Science Foundation of China[41790433] ; National Natural Science Foundation of China[41772312] ; NSFC-ICIMOD Collaborative Project[41661144041]
WOS关键词	MOUNT ST-HELENS ; 3-DIMENSIONAL TERRAIN ; DEBRIS FLOW ; WAVES ; COMPUTATION ; EARTHQUAKE ; INVERSION ; ERUPTION ; MODEL
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000468869500010
资助机构	Major Program of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-ICIMOD Collaborative Project
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/26231]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	He, Siming
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhen,He, Siming. Analysis of Broadband Seismic Recordings of Landslide Using Empirical Green's Function[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(9):4628-4635.
APA	Zhang, Zhen,&He, Siming.(2019).Analysis of Broadband Seismic Recordings of Landslide Using Empirical Green's Function.GEOPHYSICAL RESEARCH LETTERS,46(9),4628-4635.
MLA	Zhang, Zhen,et al."Analysis of Broadband Seismic Recordings of Landslide Using Empirical Green's Function".GEOPHYSICAL RESEARCH LETTERS 46.9(2019):4628-4635.