Effects of sedimentary layer on earthquake source modeling from geodetic inversion |
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| Authors: | Weiwen Chen Sidao Ni Shengji Wei Zhenjie Wang Jun Xie Mengcheng National Geophysical Observatory University of Science Technology of China Hefei China CAS Key Laboratory of Geodynamical Geodesy |
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| Institution: | Weiwen Chen 1 Sidao Ni 2,Shengji Wei 3 Zhenjie Wang 1 and Jun Xie 1 1 Mengcheng National Geophysical Observatory,University of Science and Technology of China,Hefei 230026,China 2 CAS Key Laboratory of Geodynamical Geodesy,Institute of Geodesy and Geophysics,Wuhan 430077,China 3 Seismological Laboratory,California Institute of Technology,Pasadena CA 91125,USA |
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| Abstract: | Ground deformation as observed with GPS or InSAR has been broadly inverted in constraining source parameter of earthquakes. However, for earthquakes occurring beneath sedimentary basins, the very slow sub-surface shear velocity (v S , down to 200 m/s) may cause substantial bias to earthquake source inversion if simple crustal models are used. For Bohai basin, Sichuan basin and rock-sites, we test effects of sub-surface shear velocity structure on ground deformation, and find that up to a factor of 2 overest... |
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| Keywords: | sedimentary layer ground deformation InSAR GPS |
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