Coseismic slip distribution for the <i>M<sub>w</sub></i> 9 2011 Tohoku‐Oki earthquake derived from 3‐D FE modeling

DOI Web Site Web Site 被引用文献8件
  • C. Kyriakopoulos
    School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta Georgia USA
  • T. Masterlark
    Geology and Geological Engineering South Dakota School of Mines and Technology Rapid City South Dakota USA
  • S. Stramondo
    National Earthquake Center Istituto Nazionale di Geofisica e Vulcanologia Rome Italy
  • M. Chini
    National Earthquake Center Istituto Nazionale di Geofisica e Vulcanologia Rome Italy
  • C. Bignami
    National Earthquake Center Istituto Nazionale di Geofisica e Vulcanologia Rome Italy

書誌事項

公開日
2013-07
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/jgrb.50265
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The coseismic slip distribution of the <jats:italic>M<jats:sub>w</jats:sub></jats:italic> 9.0 2011 Tohoku‐Oki earthquake has been estimated by inverting near‐field onshore and offshore geodetic data, using Green's function calculated with a 3‐D finite element (FE) model. The FE model simulates several geophysical features of the subduction zone that hosted the rupture surface of the event. These features include a 3‐D geometric configuration and distribution of material properties of the tectonic system, a precise geometric configuration of the irregular rupture surface, and an irregular free surface according to the topography and bathymetry. A model that simulates rupture along the interface between the relatively weak overriding Okhotsk plate and stiff subducting slab of the Pacific Plate requires less slip to produce the observed surface deformation, compared to a model having uniform material properties across the rupture interface. Furthermore, the estimated slip of the heterogeneous model is more widely distributed over the shallow portion of the plate boundary, whereas the estimated slip of the homogeneous model is more focused updip of the epicenter. This demonstrates the sensitivity of inverse analyses of geodetic data for the 2011 Tohoku‐Oki earthquake to the simulated domain geometry and configuration of material properties.</jats:p>

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