Quotation from their homepage:
"This online course introduces electromagnetic methods (EM) used in geophysics. [...] For professionals, it will be a source for reviewing EM fundamentals and seeing different domains of EM applications (Ground Penetrating Radar (GPR) in near surface geophysics, Magnetotellurics (MT) for geothermal prospection, marine Controlled Source Electromagnetics (mCSEM) for reservoir studies and detection of hydrocarbon...).”
A relevant tool to teach and learn more about Electromagnetics dedicated to Geophysics. Ludovic is co-author of that online course.