The magnetotelluric (MT) and audiomagnetotelluric (AMT) methods are based on the analysis of natural variations in electric and magnetic fields measured at the surface, generated by phenomena such as the interaction of the solar wind with the Earth's magnetosphere and global thunderstorm activity.
These electromagnetic variations, which propagate into the Earth’s interior, allow investigation of the distribution of electrical properties (resistivity) in subsurface materials. The classical magnetotelluric (MT) survey is mainly used for studies at great depths, due to the ability of low-frequency waves to penetrate up to tens of kilometers.
Its high-frequency variant, known as audiomagnetotelluric (AMT), on the other hand, allows for greater resolution at shallower depths, generally between a few hundred meters and a few tens of meters. The high depth of investigation, combined with the absence of artificial sources and virtually zero environmental impact, makes the MT-AMT method an extremely effective and noninvasive tool for geophysical exploration in both regional and local settings.
Fields of Application:
Regional and local mineral exploration
Geothermal prospecting
Large-scale geological studies
Hydrogeological research
Fields of Application:
Regional and local mineral exploration
Geothermal prospecting
Large-scale geological studies
Hydrogeological research
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