emsig are open-source codes to simulate electromagnetic data. Their main targets are geophysical applications (exploration and monitoring, engineering, environmental), but they are by no means limited to that. This GitHub-org contains besides the main codes also related publications for reproducibility purposes and other associated things of interest. The main website is emsig.xyz.

• ▶️ empymod: Full 3D electromagnetic modeller for 1D VTI media
• ▶️ emg3d: Multigrid solver for 3D electromagnetic diffusion
• ▶️ libdlf: Library of Digital Linear Filters
• ▶️ elfe3D: Modelling with the total electric field approach using finite elements in 3D

The following repo contains notebooks to reproduce with empymod all numerical examples of the book

• Introduction to Controlled-Source Electromagnetic Methods: Detecting Subsurface Fluids
  Ziolkowski and Slob, 2019 (Cambridge University Press; ISBN: 9781107058620)
  ▶️ csem-ziolkowski-and-slob

• Seismoelectromagnetic homogeneous space Green's functions
  Slob, E., and M. Mulder, 2016 (10.1190/geo2015-0337.1)
  ▶️ 3Dhom

• The electromagnetic response in a layered vertical transverse isotropic medium: A new look at an old problem
  Hunziker, J., J. Thorbecke, and E. Slob, 2015 (10.1190/geo2013-0411.1)
  ▶️ EMmod

• Inversion of controlled-source electromagnetic reflection responses
  Hunziker, J., J. Thorbecke, J. Brackenhoff, and E. Slob, 2016 (10.1190/geo2015-0320.1)
  ▶️ iEMmod

The repo ▶️ publications contains a list of publications related to the codes. The following a list with the repos for the most important articles, all fully reproducible:

• Towards an open-source landscape for 3-D CSEM modelling
  Werthmüller, D., R. Rochlitz, O. Castillo-Reyes, and L. Heagy, 2021 (10.1093/gji/ggab238)
  ▶️ 3d-csem-open-source-landscape

• Fast Fourier transform of electromagnetic data for computationally expensive kernels
  Werthmüller, D., W.A. Mulder, and E.C. Slob, 2021 (10.1093/gji/ggab171)
  ▶️ article-TDEM

• A tool for designing digital filters for the Hankel and Fourier transforms in potential, diffusive, and wavefield modeling
  Werthmüller, D., K. Key, and E. Slob, 2019 (10.1190/geo2018-0069.1)
  ▶️ article-fdesign

• An open-source full 3D electromagnetic modeler for 1D VTI media in Python: empymod
  Werthmüller, D., 2017 (10.1190/geo2016-0626.1)
  ▶️ article-geo2017