DOI: 10.1002/2016GL069870
论文题名: Footprints of past earthquakes revealed in the afterslip of the 2010 Mw 7.8 Mentawai tsunami earthquake
作者: Feng L. ; Barbot S. ; Hill E.M. ; Hermawan I. ; Banerjee P. ; Natawidjaja D.H.
刊名: Geophysical Research Letters
ISSN: 0094-8584
EISSN: 1944-8315
出版年: 2016
卷: 43, 期: 18 起始页码: 9518
结束页码: 9526
语种: 英语
英文关键词: afterslip
; GPS
; modeling
; subduction zone
; Sumatra
; tsunami earthquake
Scopus关键词: Deformation
; Geodetic satellites
; Geophysics
; Global positioning system
; Models
; Tsunamis
; Afterslip
; Frictional sliding
; Geodetic instruments
; Postseismic deformation
; Quasi dynamic model
; Spatiotemporal evolution
; Subduction zones
; Sumatra
; Earthquakes
英文摘要: The 2010 Mw 7.8 Mentawai tsunami earthquake marks one of the first tsunami earthquakes to have postseismic deformation observed by geodetic instruments. The Sumatran GPS Array has recorded the postseismic deformation following this event continuously for >5 years. The spatiotemporal evolution of the postseismic deformation is well explained by velocity-strengthening frictional sliding on the Sunda megathrust. Our results show that the 2010 afterslip progressed downdip relative to the 2010 coseismic rupture. The southeastern portion of the afterslip region overlaps the area that slipped during the main shock and afterslip of the 2007 Mw 8.4 Bengkulu earthquake, while the northwestern portion slipped an area without recent large earthquakes. By incorporating pre-earthquake stress conditions into quasi-dynamic models, we demonstrate that the preceding cumulative slip from the 2007 sequence might have caused a ∼0.1 MPa difference in pre-earthquake Coulomb stress between the southeastern and northwestern portions of the afterslip region. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988892866&doi=10.1002%2f2016GL069870&partnerID=40&md5=81fcb461229af908dadca7756494ea7c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9547
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: Earth Observatory of Singapore, Nanyang Technological University, Singapore
Recommended Citation:
Feng L.,Barbot S.,Hill E.M.,et al. Footprints of past earthquakes revealed in the afterslip of the 2010 Mw 7.8 Mentawai tsunami earthquake[J]. Geophysical Research Letters,2016-01-01,43(18).