Frequency-domain elastic full-waveform inversion based on Green functions

Abstract In this paper, the elastic full-waveform inversion in frequency domain based on Green functions is investigated. The method allows to image media velocities of compressional wave and shear by using vertical horizontal components. forward problem solved finite difference scheme with perfectly matched layer domain. an optimization iterative process minimize residual between synthetic data observed surface. A gradient used find direction, preconditioned diagonal part inverse Hessian matrix. constructed functions, which serves compute objective function respect model parameters effectively. completed from low high so that smaller wavelengths are progressively introduced inversion. Numerical computations for benchmark Overthrust demonstrate paper can complex structures accurately.