DOI: 10.1002/2015GL066366
论文题名: A paleogeodetic record of variable interseismic rates and megathrust coupling at Simeulue Island, Sumatra
作者: Tsang L.L.H. ; Meltzner A.J. ; Hill E.M. ; Freymueller J.T. ; Sieh K.
刊名: Geophysical Research Letters
ISSN: 0094-8296
EISSN: 1944-8027
出版年: 2015
卷: 42, 期: 24 起始页码: 10585
结束页码: 10594
语种: 英语
英文关键词: coral microatolls
; coupling
; interseismic deformation
; paleogeodesy
; seismic cycle
; Sumatran subduction zone
Scopus关键词: Couplings
; Deformation
; Geophysics
; Coral microatolls
; Interseismic deformations
; Paleogeodesy
; Seismic cycle
; Subduction zones
; Earthquakes
; atoll
; coseismic process
; deformation mechanism
; earthquake event
; earthquake rupture
; geodetic datum
; GPS
; historical record
; paleoseismicity
; subduction zone
; thrust
; vertical movement
; Aceh
; Greater Sunda Islands
; Simeulue
; Sumatra
; Sunda Isles
; Sunda Isles
; Anthozoa
英文摘要: An â1100 year long paleogeodetic record of land-height change along the Simeulue section of the Sumatran subduction zone reveals significant variations in vertical motion rates. From an â267 year long record, we develop models to explain rate variations in the decades before the 1861, 2004, and 2005 great earthquakes. The record shows that rates accelerated by a factor of 4 to 10 in the decades before the 1861 earthquake; one plausible explanation is a significant increase in the depth of interseismic coupling on the Sunda megathrust under Simeulue. Despite similarity of the 1861 and 2005 coseismic rupture patterns, the pattern of coupling during the decades before the two earthquakes may have been different. Most GPS observations of interseismic deformation at subduction zones span only a decade or two; our results highlight the need to treat GPS-derived coupling maps as only a snapshot of fault conditions that are temporally variable. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955212180&doi=10.1002%2f2015GL066366&partnerID=40&md5=2d8421f7dcb0d59c8793baf28423bbd7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7912
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, Singapore
Recommended Citation:
Tsang L.L.H.,Meltzner A.J.,Hill E.M.,et al. A paleogeodetic record of variable interseismic rates and megathrust coupling at Simeulue Island, Sumatra[J]. Geophysical Research Letters,2015-01-01,42(24).