IMHE OpenIR  > 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, Zhen1,2; He, Siming1,2,3
Corresponding AuthorHe, Siming(hsm@imde.ac.cn)
2019-05-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume46Issue:9Pages:4628-4635
AbstractThe 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.
DOI10.1029/2018GL081448
Indexed BySCI
WOS KeywordMOUNT ST-HELENS ; 3-DIMENSIONAL TERRAIN ; DEBRIS FLOW ; WAVES ; COMPUTATION ; EARTHQUAKE ; INVERSION ; ERUPTION ; MODEL
Language英语
Funding ProjectMajor Program of the National Natural Science Foundation of China[41790433] ; National Natural Science Foundation of China[41772312] ; NSFC-ICIMOD Collaborative Project[41661144041]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000468869500010
Funding OrganizationMajor Program of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-ICIMOD Collaborative Project
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26231
Collection山地灾害与地表过程重点实验室
Corresponding AuthorHe, Siming
Affiliation1.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
Recommended Citation
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.
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