One-Dimensional Magnetotelluric Inversion with MATLAB Implementation

The MATLAB-based program for one-dimensional magnetotelluric inversion represents a fundamental computational tool for geophysicists and exploration engineers. This implementation features advanced numerical algorithms including forward modeling solvers, gradient-based optimization methods (such as Gauss-Newton or Levenberg-Marquardt), and regularization techniques for stable inversion results. The core functionality encompasses impedance tensor calculations, sensitivity analysis, and layered-earth model parameterization through iterative misfit minimization. Key MATLAB functions include mesh generation for discretized subsurface structures, matrix operations for efficient solution of electromagnetic field equations, and visualization modules for resistivity-depth profile interpretation. Researchers can customize the inversion parameters, modify the objective function weights, and integrate additional constraints through modular code architecture. This open-source implementation enables comprehensive analysis of magnetotelluric data to resolve subsurface conductivity distributions, with applications in hydrocarbon exploration, geothermal resource assessment, and tectonic studies. The well-documented source code supports algorithm verification, method comparison, and educational purposes in geophysical inversion methodology.