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@@ -7,7 +7,9 @@ FEMTIC is a 3-D magnetotelluric inversion code based on the following studies. F
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*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.*
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*Y. Usui, Applicability evaluation of non-conforming deformed hexahedral mesh for marine magnetotellurics, Japan Geoscience Union Meeting 2021, 2021*
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*Y. Usui, M. Uyeshima, H. Hase, H. Ichihara, K. Aizawa, T. Koyama, et al. Three-dimensional electrical resistivity structure beneath a strain concentration area in the back-arc side of the northeastern Japan arc. Journal of Geophysical Research: Solid Earth, 129, e2023JB028522. http://doi.org/10.1029/2023JB028522, 2024.*
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*Y. Usui, M. Uyeshima. Three-dimensional combined inversion method of the MT and Network-MT response functions. Earth Planets Space 77, 135. https://doi.org/10.1186/s40623-025-02266-x, 2025.*
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**The website of FEMTIC:**
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https://sites.google.com/view/yoshiyausui/femtic
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@@ -17,7 +19,7 @@ FEMTIC gives a three-dimensional electrical resistivity structure from the respo
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**Mesh type**: Tetrahedral mesh / Hexahedral brick mesh / Non-conforming deformed hexahedral mesh
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**Data type**: Impedance tensor / Vertical magnetic transfer function / Inter-station horizontal magnetic transfer function / Phase tensor / Apparent resistivity & Phase.
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**Data type**: Impedance tensor / Vertical magnetic transfer function / Inter-station horizontal magnetic transfer function / Phase tensor / Apparent resistivity & Phase / Network-MT response function / Impedance tensor obtained from the Network-MT response functions / Apparent resistivity & Phase obtained from the Network-MT response functions.
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**Inversion algorithm**: Model-space Gauss-Newton method / Data-space Gauss-Newton method
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@@ -29,6 +31,8 @@ FEMTIC gives a three-dimensional electrical resistivity structure from the respo
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## Release note
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***v4.3*** Feb. 6, 2025: The directory for the out-of-core files of the sensitivity matrix becomes changeable.
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***v4.2*** Mar. 25, 2024: I modified some parts to allow the use of large-scale models and large datasets.
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***v4.1*** Nov. 9, 2021: This new version supports difference filter. The error calculation of log10(apparent resistivity) is modified. Rotation angles of distortion matrix are limited to from -90 to 90 (deg.) when gains and rotations of galvanic distortion are estimated.
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