基于地壳分层的地震断层同震变形反演分析
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摘要
顾及地球结构的非均匀性、分层和球体特性,发展了顾及地壳分层结构的地震断层同震位错模型的反演模式,建立了非线性反演方程,对主要的两类地震断层分别进行了模拟反演分析。反演结果显示,该反演模式可很好地将断层位错参数反演出来,利用该模式可较好地解决实际地震断层同震变形的反演问题。
The co-seismic deformation inversion mode due to seismic fault has been set up considering the earth-stratified structure.Using the nonlinear inversion formulation the simulated calculation and inversion analysis has been made to study the two main earthquake faults(strike slip fault and dip slip fault) separately.The inverted results show that the inversion mode could well invert out the fault dislocation parameters and could be better settle down the inversion work to the practical seismic fault co-seismic inversion problem.
The co-seismic deformation inversion mode due to seismic fault has been set up considering the earth-stratified structure.Using the nonlinear inversion formulation the simulated calculation and inversion analysis has been made to study the two main earthquake faults(strike slip fault and dip slip fault) separately.The inverted results show that the inversion mode could well invert out the fault dislocation parameters and could be better settle down the inversion work to the practical seismic fault co-seismic inversion problem.
引文
[1]Okada Y.Surface Deformation Due to Shear andTensile Faults in a Half-Space[J].Bull Seism SocAm,1985,75:1 135-1 154
[2]Okada Y.Internal Deformation Due to Shear andTensile Faults in a Half-space[J].Bull seism SocAm,1992,82:1 018-1 040
[3]Pollitz F.Coseismic Deformation from EarthquakeFaulting on a Layered Spherical Earth[J].GeophysJ Int,1996,125:1-14
[4]Sun Wenke,Okubo S.Surface Potential and Gravi-ty Changes Due to Internal Dislocation in a SphericalEarth[J].Geophys J Int,1993,114:569-592
[5]Sun Wenke,Okubo S.Surface Potential and Gravi-ty Changes Due to Internal Dislocation in a Spherical[J].Geophys J Int,1998,132:79-88
[6]Cervelli P,Murray M,Segall P,et al.EstimatingSource Parameters from Deformation Data,with anApplication to the March 1997 Earthquake Swarmoff the Izu Peninsula[J].Japan J Geophys Res,2001,106:11 217-11 237
[7]Freymuller J,Murray M H,Segall P,et al.Kine-matics of the Pacific-North America Plate BoundaryZone,Northern California[J].J Geophys Res,1999,104(B4):7 419-7 441
[8]Larson K M R B,Bilham R.Kinematics of the In-dia-Eurasia Collision Zone from GPS Measurements[J].J Geophys Res,1999,101:1 077-1 093
[9]Sun Wenke,Okubo S.Effects of Earth’s SphericalCurvature and Radial Heterogeneity in DislocationStudies for a Point Dislocation[J].Geophys ResLett,2002,29:46-49
[10]Cesca S,Vermeersen L,Sabadini R.Influence ofLithospheric and Mantle Stratification on Co-andPost-Seismic Deformation Due to Finite Faults[J].Geophys J Int,2000,143:575-581
[11]Zhao Shaorong,Muller R D,Takahashi Y,et al.3D Finite-Element Modeling of Deformation andStress Associated with Faulting:Effect of Inhomo-geneous Crustal Structures[J].Geophys J Int,2004,157:629-644
[12]李志才,许才军,赵少荣,等.同震变形分析中不同地球结构模型差异性的研究[J].大地测量与地球动力学,2005,25(3):39-44
[2]Okada Y.Internal Deformation Due to Shear andTensile Faults in a Half-space[J].Bull seism SocAm,1992,82:1 018-1 040
[3]Pollitz F.Coseismic Deformation from EarthquakeFaulting on a Layered Spherical Earth[J].GeophysJ Int,1996,125:1-14
[4]Sun Wenke,Okubo S.Surface Potential and Gravi-ty Changes Due to Internal Dislocation in a SphericalEarth[J].Geophys J Int,1993,114:569-592
[5]Sun Wenke,Okubo S.Surface Potential and Gravi-ty Changes Due to Internal Dislocation in a Spherical[J].Geophys J Int,1998,132:79-88
[6]Cervelli P,Murray M,Segall P,et al.EstimatingSource Parameters from Deformation Data,with anApplication to the March 1997 Earthquake Swarmoff the Izu Peninsula[J].Japan J Geophys Res,2001,106:11 217-11 237
[7]Freymuller J,Murray M H,Segall P,et al.Kine-matics of the Pacific-North America Plate BoundaryZone,Northern California[J].J Geophys Res,1999,104(B4):7 419-7 441
[8]Larson K M R B,Bilham R.Kinematics of the In-dia-Eurasia Collision Zone from GPS Measurements[J].J Geophys Res,1999,101:1 077-1 093
[9]Sun Wenke,Okubo S.Effects of Earth’s SphericalCurvature and Radial Heterogeneity in DislocationStudies for a Point Dislocation[J].Geophys ResLett,2002,29:46-49
[10]Cesca S,Vermeersen L,Sabadini R.Influence ofLithospheric and Mantle Stratification on Co-andPost-Seismic Deformation Due to Finite Faults[J].Geophys J Int,2000,143:575-581
[11]Zhao Shaorong,Muller R D,Takahashi Y,et al.3D Finite-Element Modeling of Deformation andStress Associated with Faulting:Effect of Inhomo-geneous Crustal Structures[J].Geophys J Int,2004,157:629-644
[12]李志才,许才军,赵少荣,等.同震变形分析中不同地球结构模型差异性的研究[J].大地测量与地球动力学,2005,25(3):39-44
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