This project was started by Dieter Werthmüller. Every contributor will be listed here and is considered to be part of «The emg3d Developers»:

Various bits got improved through discussions on Slack at SWUNG and at SimPEG, thanks to both communities. Special thanks to @jokva (general), @banesullivan (visualization), @joferkington (interpolation), and @jcapriot (volume averaging).

Historical credits

The core of emg3d is a complete rewrite and redesign of the multigrid code by Wim A. Mulder ([Muld06], [Muld07], [Muld08], [MuWS08]), developed at Shell and at TU Delft. Various authors contributed to the original code, amongst others, Tom Jönsthövel ([JoOM06]; improved solver for strongly stretched grids), Marwan Wirianto ([WiMS10], [WiMS11]; computation of time-domain data), and Evert C. Slob ([SlHM10]; analytical solutions). The original code was written in Matlab, where the most time- and memory-consuming parts were sped up through mex-files (written in C). It included multigrid with or without BiCGSTAB, VTI resistivity, semicoarsening, and line relaxation; the number of cells had to be powers of two, and coarsening was done only until the first dimension was at two cells. As such it corresponded roughly to emg3d v0.3.0.

See the References in the manual for the full citations and a more extensive list.


This software was initially (till 05/2021) developed at Delft University of Technology ( within the Gitaro.JIM project funded through MarTERA as part of Horizon 2020, a funding scheme of the European Research Area (ERA-NET Cofund,