DOI: 10.1029/2012GL054148
论文题名: 3-D active source tomography around Simeulue Island offshore Sumatra: Thick crustal zone responsible for earthquake segment boundary
作者: Tang G. ; Barton P.J. ; McNeill L.C. ; Henstock T.J. ; Tilmann F. ; Dean S.M. ; Jusuf M.D. ; Djajadihardja Y.S. ; Permana H. ; Klingelhoefer F. ; Kopp H.
刊名: Geophysical Research Letters
ISSN: 0094-9390
EISSN: 1944-9121
出版年: 2013
卷: 40, 期: 1 起始页码: 48
结束页码: 53
语种: 英语
Scopus关键词: Earthquake rupture
; Intermediate velocities
; Multi-channel seismic
; Primary control
; Seismic refraction data
; Subducting plate
; Subduction zones
; Travel time tomography
; Air
; Earthquakes
; Image segmentation
; Seismic waves
; Tectonics
; Tomography
; Travel time
; Wave propagation
; Three dimensional
; crustal structure
; earthquake rupture
; P-wave
; seismic reflection
; seismic refraction
; seismograph
; subduction zone
; three-dimensional modeling
; tomography
; Aceh
; Greater Sunda Islands
; Indonesia
; Simeulue
; Sumatra
; Sunda Isles
英文摘要: We present a detailed 3-D P-wave velocity model obtained by first-arrival travel-time tomography with seismic refraction data in the segment boundary of the Sumatra subduction zone across Simeulue Island, and an image of the top of the subducted oceanic crust extracted from depth-migrated multi-channel seismic reflection profiles. We have picked P-wave first arrivals of the air-gun source seismic data recorded by local networks of ocean-bottom seismometers, and inverted the travel-times for a 3-D velocity model of the subduction zone. This velocity model shows an anomalous zone of intermediate velocities between those of oceanic crust and mantle that is associated with raised topography on the top of the oceanic crust. We interpret this feature as a thickened crustal zone in the subducting plate with compositional and topographic variations, providing a primary control on the upper plate structure and on the segmentation of the 2004 and 2005 earthquake ruptures. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874914063&doi=10.1029%2f2012GL054148&partnerID=40&md5=7c5d18fa5c06909080a53b24906bfcce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6654
Appears in Collections: 气候减缓与适应
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作者单位: Bullard Laboratories, University of Cambridge, Cambridge, United Kingdom
Recommended Citation:
Tang G.,Barton P.J.,McNeill L.C.,et al. 3-D active source tomography around Simeulue Island offshore Sumatra: Thick crustal zone responsible for earthquake segment boundary[J]. Geophysical Research Letters,2013-01-01,40(1).