DOI: 10.1002/2014GL061735
论文题名: Afterslip and viscoelastic relaxation following the 2011 Tohoku-oki earthquake (M<inf>w</inf>9.0) inferred from inland GPS and seafloor GPS/Acoustic data
作者: Yamagiwa S. ; Miyazaki S. ; Hirahara K. ; Fukahata Y.
刊名: Geophysical Research Letters
ISSN: 0094-9071
EISSN: 1944-8802
出版年: 2015
卷: 42, 期: 1 起始页码: 66
结束页码: 73
语种: 英语
英文关键词: afterslip
; inversion
; seafloor GPS/Acoustic measurements
; the 2011 Tohoku earthquake
; viscoelastic relaxation
Scopus关键词: Earthquakes
; 2011 tohoku earthquakes
; afterslip
; inversion
; Sea floor
; Viscoelastic relaxation
; Viscoelasticity
; displacement
; GPS
; Green function
; rupture
; seafloor mapping
; slip rate
; viscoelasticity
英文摘要: We simultaneously estimate 2.5 years of afterslip and viscoelastic relaxation, as well as coseismic slip, for the 2011 Tohoku-oki earthquake. Displacements at inland GPS and seafloor GPS/Acoustic stations are inverted using viscoelastic Green's functions for a model with an upper elastic layer and lower viscoelastic substrate. The result shows that afterslip is isolated from the rupture area and possibly asperities of historical earthquakes and has almost decayed by 10 September 2013, 2.5 years after the main shock. The inversion result also suggests that observed landward postseismic displacements at the seafloor GPS/Acoustic stations are caused by the viscoelastic relaxation, whereas trenchward displacements at inland stations are mainly an elastic response to afterslip. Key Points A coupled afterslip and viscoelastic relaxation model fits postseismic data Viscous flow induces landward motions at GPS/A stations above the rupture area Afterslip in the downdip extension of the rupture area has decayed in 2.5 years ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921777702&doi=10.1002%2f2014GL061735&partnerID=40&md5=d5ad2ae1cabbe9997fcc98b41131bc75
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8687
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Graduate School of Science, Kyoto University, Kyoto, Japan
Recommended Citation:
Yamagiwa S.,Miyazaki S.,Hirahara K.,et al. Afterslip and viscoelastic relaxation following the 2011 Tohoku-oki earthquake (M<inf>w</inf>9.0) inferred from inland GPS and seafloor GPS/Acoustic data[J]. Geophysical Research Letters,2015-01-01,42(1).