Inversio

Modern software for MT data analysis, inversion, and interpretation.

Inversio enables multi-scale studies within 1D, 2D, and 3D models using a wide range of tools and technologies — from visualization of various input parameters and curve normalization to forward and inverse problem calculations.

The use of advanced technologies in the development of algorithms and the user interface helps reduce time spent on office work and improves the quality of MT data analysis and interpretation at all stages.

The software is developed and maintained by "Scientific and Technological Center Nord-West". All rights reserved.

State Registration Certificate for Computer Program No. 2022666137 dated August 25, 2022. Registry number in the Russian Software Register: 17563 dated May 17, 2023.
"STC Nord-West" site

General Information

The Inversio is designed for the interpretation of magnetotelluric sounding (MT) data — one of the primary methods of modern electrical prospecting, widely used in solid mineral exploration, hydrocarbon exploration, and regional studies, as well as in investigations of the Earth's deep structure, and for solving engineering, environmental, geocryological, and hydrogeological problems.

Inversio incorporates all the principal tools for analysis and inversion (1D and 2D) of MT data along profiles and over areas, within a single graphical environment with a unified user interface.

Implemented Functionality

Development of Inversio has been ongoing for several years. As of early 2025, the following features have been implemented in the program:
  • MT data loading
    The primary data format loaded into Inversio is the international SEG EDI 2.0 format. In addition, a number of proprietary formats (MPD, MT, MOD) are supported for loading data, models, and inversion results.
  • Visualization of Input Data as Maps, Sections, and Graphs
    Considerable attention in Inversio is devoted to various data visualization options. More than 15 different forms of MT data presentation are already available:
    • Maps at a given frequency (input data, phase tensor ellipses, polar diagrams, induction arrows);
    • Depth slices of 1D and 2D inversion results;
    • Frequency sections;
    • Sets of graphs along a profile;
    • Sections of ellipses and polar diagrams;
    • Sections of induction arrows;
    • Sounding curves at a site;
    • Ellipses and polar diagrams at a frequency;
    • Induction arrows at a frequency;
    • Rose diagrams (directivity patterns).
  • Data Rotation and Static Shift Correction of MT Amplitude Curves
    Inversio includes tools used at the data preparation stage for interpretation: data rotation (in the case of approximately 2D structure of the medium) and suppression of the influence of near-surface inhomogeneities (normalization).
  • Automatic 1D Inversion and Manual Model Fitting
    Inversio incorporates two algorithms for automatic 1D inversion of MT data:
    1. The algorithm by A. E. Kaminsky, used in the well-known Zond software family;
    2. A proprietary 1D inversion algorithm developed by D. V. Epishkin.
    A powerful visualization module has been created for displaying inversion results and manual model adjustment.
  • Automatic 2D Inversion
    The primary 2D inversion algorithm in Inversio is the finite-element algorithm by A. E. Kaminsky, used in the well-known Zond software family. Additionally, the finite-difference algorithm by R. Mackie is built into the software for testing and comparison purposes. The user interface provides all the necessary functionality for creating and editing the 2D inversion mesh and the geoelectrical model.

  • Data and Results Export
    MT data prepared for interpretation can be exported from Inversio in EDI format (primary), as well as in MT and MPD formats. Maps and sections can be exported as images, as text data (tables), and as sections and maps into the Surfer software.
News and updates
Latest publications in the Telegram channel: t.me/nwinversio
More news and up-to-date information at t.me/nwinversio

Want to be among the first users of Inversio?

To inquire about pricing and discounts, write to us at stcnordwest@gmail.com or submit a request using the form below.

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Development Roadmap

In the near future, the following features are planned for implementation in the program:
  • Intelligent Mesh Generation
    The success of 2D and 3D inversion is largely determined by the correctness of the model discretization. An intelligent algorithm for generating the model mesh based on input data analysis is planned, which will significantly reduce the time spent on the 2D inversion stage.

  • 3D Modeling and Inversion
    Development of a graphical interface for 3D modeling and 3D inversion on a regular grid (finite-difference method) using third-party calculation engines is planned: Inversio will handle data preparation, 3D mesh setup, and visualization of results, while the calculations themselves will be performed in an external application.
  • Multi-User Mode
    Modern MT projects involve thousands of soundings. Interpretation of such projects is carried out by teams of several specialists. Collaborative work on a single project with role-based access control is planned. This will enable more efficient team collaboration.

  • Static Shift Correction
    Static shift of impedance amplitude curves — described by prominent researcher A. Price as "the villain of the magnetotelluric play" — will be addressed in Inversio through several correction methods, ranging from classical to state-of-the-art approaches currently under discussion in the scientific community. The primary correction methods will be "statistical" and normalization using TDEM data in automatic mode.

  • Integration with a priori information
    The use of a priori information is a key element in the interpretation of any geophysical data, including magnetotelluric data. In the upcoming development phase, Inversio is expected to incorporate integration with seismic and drilling data: loading and visualization of these data, and their consideration during MT data inversion. Future plans include extended support for potential field methods.

  • Advanced technology for everyone!
    Inversio is expected to implement an innovative licensing approach. This approach will provide access to Inversio both to large companies interpreting thousands of MT soundings annually and to individual researchers working with small volumes of archival data. At the same time, all users will have access to the full range of advanced tools for analysis and interpretation of magnetotelluric data.

Development and testing of software for processing, analysis, and interpretation of magnetotelluric sounding data is carried out by with the support of the Federal State Budgetary Institution "Fund for Assistance to Small Innovative Enterprises in Science and Technology" (Fund for Assistance to Small Innovative Enterprises)