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Title: Extended Seismic Source Characterisation using Linear Programming Inversion in a Dual Formulation
Authors: Caldeira, B.
Borges, J.F.
Bezzeghoud, M.
Bushenkov, V.
Smirnov, G.
Editors: Oliveira, C.S.
Keywords: Seismic source reconstitution
Numerical techniques
Joint seismic and geodetic data inversion
Issue Date: 24-Sep-2012
Publisher: Portuguese Society for Earthquake Engineering
Citation: Caldeira B., J.F. Borges, M. Bezzeghoud, V. Bushenkov, G. Smirnov, 2012. Extended Seismic Source Characterization using Programming Inversion in DUAL Formulation. 15th World Congress in Earthquake Engineering, Lisbon, 24-28 Sep. 2012, 9 p.
Abstract: A linear programming (LP) inversion method in a dual formulation was applied to reconstruct the kinematics of finite seismic ruptures. In a general setting, this approach can yield results from several data sets: strong ground motion, teleseismic waveforms or/and geodesic data (static deformation). The dual formulation involves the transformation of a normal solution space into an equivalent but reduced space: the dual space. The practical result of this transformation is a simpler inversion problem that is therefore faster to resolve, more stable and more robust. The developed algorithm includes a forward problem that calculates Green’s functions using a finite differences method with a 3D structure model. To evaluate the performance of this algorithm, we applied it to the reconstitution of a realistic slip distribution model from a data set synthesised using this model, i.e., the solution of the forward problem. Several other standard inversion approaches were applied to the same synthetic data for comparison.
Type: article
Appears in Collections:FIS - Artigos em Livros de Actas/Proceedings
CGE - Artigos em Livros de Actas/Proceedings

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