EMagPy: Open-source standalone software for processing, forward modeling and inversion of electromagnetic induction data

Abstract Frequency domain electromagnetic induction (EMI) methods have had a long history of qualitative mapping for environmental applications. More recently, the development multi-coil and multi-frequency instruments is such that focus has shifted toward inverting data to obtain quantitative models electrical conductivity. However, whilst collection EMI relatively straightforward, inverse modeling more complicated. Furthermore, although several commercial open-source inversion codes exist, there still need user-friendly software can bring non-specialist audience. Here EMagPy presented as an intuitive approach data. It comprises graphical user interface (GUI) Python application programming (API) suitable specialized tasks. implements both cumulative sensitivity Maxwell-based forward operators model 1D quasi-2D/3D cases using either deterministic or probabilistic methods. The GUI logical ‘tab-based’ layout lead through importing, filtering, inversion, plotting raw inverted Additionally, dedicated tab allows generation synthetic In this publication, necessary considerations, background, theory are described before EMagPy's capabilities series field-based case studies. Firstly, performance models, influence measurement noise assessed cases. Then importance calibration riparian wetland dataset, ability include priori information river-borne survey, potential monitoring soil moisture in time-lapse example all investigated. anticipated offers tool novice experienced practitioners alike, its nature means it provide useful teaching purposes.