3D EM modeller for 1D VTI media

The modeller empymod can compute electric or magnetic responses due to a 3D electric or magnetic source in a layered-earth model with vertical transverse isotropic (VTI) resistivity, VTI electric permittivity, and VTI magnetic permeability, from very low frequencies (DC) to very high frequencies (GPR). The computation is carried out in the wavenumber-frequency domain, and various Hankel- and Fourier-transform methods are included to transform the responses into the space-frequency and space-time domains.


Multigrid solver for 3D EM diffusion

The modeller emg3d is a multigrid solver for 3D EM diffusion with tri-axial electrical anisotropy. The matrix-free solver can be used as main solver or as preconditioner for Krylov subspace methods, and the governing equations are discretized on a staggered Yee grid.

Additionally recommended are discretize (advanced meshing and plotting), xarray (required for data handling of entire surveys), h5py (data storage), empymod (required for time-domain modelling), tqdm, and scooby.