EMIGMA is a geophysics interpretation software platform developed by Petros Eikon Incorporated for data processing, simulation, inversion and imaging as well as other associated tasks.
Principal contributors to the software are R. W. Groom,[9] H. Wu, E. Vassilenko,[10] R. Jia,[9] C. Ottay and C. Alvarez.
[12] Geological models can be simulated for a variety of geophysical measurement systems such as conventional dipole-dipole, FEM, time domain electromagnetics(TEM), Magnetotellurics(MT), CSEM/CSAMT, magnetic, gravity, resistivity and induced polarization systems.
[13] Blocks and polyhedra components of a model are simulated by algorithms based on the LN approximation.
[14] When compared with a real world electromagnetic system, it has been found that simulation results for a thin plate tended to agree in some situations.
One case study required other algorithms for initial analysis of data due to EMIGMA's complexity.
Measured and synthetic data can be viewed in different formats including vectors, lines, surfaces and contours in association with the models.
Data can be displayed on a 2D axis as a function of time, frequency, position or tx-rx separation.
[13] Multiple data can be interpolated into a multi-dimensional grid to allow viewing of maps of such things as multi-time windows or multi-transmitter receiver settings.
Grid cells need not be square but may be rectangular to correspond to different spatial densities of stations and lines.
PseudoShow displays data from a series of points as a cross section by assigning tx-rx separation, frequency or time values to depth.
FFT processing is available for gravity and magnetic data including derivative generation, windowing and upward/downward continuation.
Other tools provide features such as digital and spatial data filtering as well as survey editing.
Simulation of geophysical models for various EM systems such as surface and borehole TDEM, airborne and ground FDEM, IP/Resistivity, Magnetotellurics, and CSAMT as a controlled source application.
[22] Full compatibility with Windows Vista was added to EMIGMA with the April 2008 release of version 8.
A new Fortran compiler was used to rebuild the algorithm code for numerical algorithms such as 3D magnetic and gravity inversion, data interpolation and freespace plate simulation, increasing the scale of problems that could be processed and increasing speed by 5 times.