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A New Transient Electromagnetic System Capable of Mapping the Subsurface in Full 3D

December 6, 2019 @ 3:30 pm - 4:30 pm

Esben Auken

What to Expect

New electronics and faster computers are creating exiting opportunities for developing new EM instruments with hitherto unseen capabilities for resolving subsurface geological structures with a very high resolution. With an offset in airborne electromagnetic, more specifically the SkyTEM system, we have developed a small coil compact system called tTEM. Where SkyTEM is a large moment system capable of resolving the geology to a depth of up to 500 m, tTEM is focused on the top 100 m. tTEM produces data typically sampled with 10 m between the soundings and 20 m between the lines. In the presentation I will explain the exiting development process and show examples on where the system has been used in the context of surface water/climate adaptation, artificial infiltration, nitrate leakage from farmfields etc.

Speaker Bio

Esben Auken is a professor of geophysics at the Department of Geoscience, Aarhus University, Denmark. He gained an MSc (1991) and PhD (1996) in geophysics from Aarhus University. His research group, The HydroGeophysics Group (HGG), is about 30 scientists all working with electrical and electromagnetic methods for high resolution mapping of the shallow subsurface with focus on surface and groundwater. HGG does high-level research on instrumental engineering, data processing and high performance 1D, 2D and 3D inversion algorithms. Hydrological modelling with extensive input from areal covering geophysical measurements is an integrated part of the research. The geophysical focus areas are surface Nuclear Magnetic Resonance (NMR), groundbased and airborne transient electromagnetic and surface and cross borehole direct current and induced polarization. In addition, Esben teaches short courses for professionals and for undergraduate and postgraduate students. He is co-founder of SkyTEM Surveys Aps and Aarhus Geosoftware Aps, both spin-out companies from the research group.


Sebatian Uhlemann