DOI: 10.1002/2014GL061134
论文题名: Evidence of viscoelastic deformation following the 2011 Tohoku-Oki earthquake revealed from seafloor geodetic observation
作者: Watanabe S.-I. ; Sato M. ; Fujita M. ; Ishikawa T. ; Yokota Y. ; Ujihara N. ; Asada A.
刊名: Geophysical Research Letters
ISSN: 0094-9855
EISSN: 1944-9586
出版年: 2014
卷: 41, 期: 16 起始页码: 5789
结束页码: 5796
语种: 英语
Scopus关键词: Earthquakes
; Geodetic satellites
; Transport properties
; Viscoelasticity
; 2011 Tohoku-Oki earthquakes
; Geodetic observation
; Global Navigation Satellite Systems
; Pacific coasts
; Source region
; Upward movement
; Viscoelastic deformation
; Viscoelastic relaxation
; Global positioning system
; deformation
; earthquake event
; postseismic process
; rupture
; seafloor mapping
; subsidence
; viscoelasticity
; Japan
英文摘要: The GPS/acoustic seafloor positioning has detected significant postseismic movements after the 2011 Tohoku-Oki earthquake (M9.0), just above the source region off the Pacific coast of eastern Japan. In contrast to the coastal Global Navigation Satellite Systems sites where trenchward-upward movements were reported, the offshore sites above the main rupture zone in the northern part of the source region exhibit landward displacements of tens of centimeters with significant subsidence from almost 3 years of repeated observations. At the sites above around the edge of the main rupture zone, smaller amount of trench-normal movements was found. Although the terrestrial movements were reasonably interpreted by afterslip beneath the coastal area, these offshore results are rather consistent with effects predicted from viscoelastic relaxation in the upper mantle, providing definitive evidence of its occurrence. On the other hand, the results in the southern part of the source region imply superposition of effects from viscoelastic relaxation and afterslip. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906531495&doi=10.1002%2f2014GL061134&partnerID=40&md5=10b15fea8ac2f9f71594910c5bd2eb8c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7119
Appears in Collections: 气候减缓与适应
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作者单位: Hydrographic and Oceanographic Department, Japan Coast Guard, Tokyo, Japan
Recommended Citation:
Watanabe S.-I.,Sato M.,Fujita M.,et al. Evidence of viscoelastic deformation following the 2011 Tohoku-Oki earthquake revealed from seafloor geodetic observation[J]. Geophysical Research Letters,2014-01-01,41(16).