FEMTIC

FEMTIC is a 3-D magnetotelluric inversion code based on the following studies. FEMTIC was made using object-oriented programming with C++.

Y. Usui, 3-D inversion of magnetotelluric data using unstructured tetrahedral elements: applicability to data affected by topography, Geophys. J. Int., 202 (2): 828-849, https://doi.org/10.1093/gji/ggv186, 2015.

Y. Usui, Y. Ogawa, K. Aizawa, W. Kanda, T. Hashimoto, T. Koyama, Y. Yamaya and T. Kagiyama, Three-dimensional resistivity structure of Asama Volcano revealed by data-space magnetotelluric inversion using unstructured tetrahedral elements, Geophys. J. Int., 208 (3): 1359-1372, https://doi.org/10.1093/gji/ggw459, 2017.

Y. Usui, T. Kasaya, Y. Ogawa and H. Iwamoto, Marine magnetotelluric inversion with an unstructured tetrahedral mesh, Geophys. J. Int., 214(2): 952-974, https://doi.org/10.1093/gji/ggy171, 2018.

The website of FEMTIC: https://sites.google.com/view/yoshiyausui/femtic

Functional overview

FEMTIC gives a three-dimensional electrical resistivity structure from the response functions at observation points on the Earth's surface.

Mesh type: tetrahedral mesh, hexahedral brick mesh, and non-conforming deformed hexahedral mesh

Data type: impedance tensor, vertical magnetic transfer function, inter-station horizontal magnetic transfer function, phase tensor, apparent resistivity, and phase.

Parallel computation: Hybrid MPI/OpenMP parallel calculation can be used.

Model parameter: Subsurface electrical resistivity and distortion matrix of galvanic distortion.

https://github.com/yoshiya-usui/femtic/issues/1#issue-1050603587