An adjoint-based FEM optimization of coseismic displacements following the 2011 Tohoku earthquake: new insights for the limits of the upper plate rebound
文献类型：期刊论文
| 作者 | Pulvirenti, Fabio1; Jin, Shuanggen2 ; Aloisi, Marco3
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| 刊名 | PHYSICS OF THE EARTH AND PLANETARY INTERIORS
 |
| 出版日期 | 2014-12-01 |
| 卷号 | 237期号:1页码:25-39 |
| 关键词 | 2011 Tohoku earthquake FEM optimization Coseismic displacement Upper plate rebound |
| 英文摘要 | The 11 March 2011 Tohoku earthquake was the strongest event recorded in recent historic seismicity in Japan. Several researchers reported the deformation and possible mechanism as triggered by a mega thrust fault located offshore at the interface between the Pacific and the Okhotsk Plate. The studies to estimate the deformation in detail and the dynamics involved are still in progress. In this paper, coseismic GPS displacements associated with Tohoku earthquake are used to infer the amount of slip on the fault plane. Starting from the fault displacements configuration proposed by Caltech-JPL ARIA group and Geoazur CNRS, an optimization of these displacements is performed by developing a 3D finite element method (FEM) model, including the data of GPS-acoustic stations located offshore. The optimization is performed for different scenarios which include the presence of topography and bathymetry (DEM) as well as medium heterogeneities. By mean of the optimized displacement distribution for the most complete case (heterogeneous with DEM), a broad slip distribution, not narrowly centered east of hypocenter, is inferred. The resulting displacement map suggests that the beginning of the area of subsidence is not at east of MYGW GPS-acoustic station, as some researchers have suggested, and that the area of polar reversal of the vertical displacement is rather located at west of MYGW. The new fault slip distribution fits well for all the stations at ground and offshore and provides new information on the earthquake generation process and on the kinematics of Northern Japan area. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | M-W 9.0 ; SEISMIC VELOCITY STRUCTURE ; NORTHEASTERN JAPAN ARC ; OKI EARTHQUAKE ; CRUSTAL DEFORMATION ; PACIFIC COAST ; SUBDUCTION ZONE ; DEEP-STRUCTURE ; SOURCE MODEL ; HALF-SPACE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000345722800003 |
| 源URL | [http://119.78.226.72/handle/331011/16187]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Comsol Multiphys GmbH, D-37073 Gottingen, Germany 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Osservatorio Etneo, Ist Nazl Geofis & Vulcanol, Catania, Italy |
| 推荐引用方式 GB/T 7714 | Pulvirenti, Fabio,Jin, Shuanggen,Aloisi, Marco. An adjoint-based FEM optimization of coseismic displacements following the 2011 Tohoku earthquake: new insights for the limits of the upper plate rebound[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2014,237(1):25-39. |
| APA | Pulvirenti, Fabio,Jin, Shuanggen,&Aloisi, Marco.(2014).An adjoint-based FEM optimization of coseismic displacements following the 2011 Tohoku earthquake: new insights for the limits of the upper plate rebound.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,237(1),25-39. |
| MLA | Pulvirenti, Fabio,et al."An adjoint-based FEM optimization of coseismic displacements following the 2011 Tohoku earthquake: new insights for the limits of the upper plate rebound".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 237.1(2014):25-39. |
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来源：上海天文台
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