LIAG / Institute / Departments / Geoelectrics & Electromagnetics 

Geoelectrics & Electromagnetics

The section conducts experimental and theoretical research to image the subsurface structure and to characterize processes that change the subsurface using electromagnetic methods. Imaging und chracterization therefore base on the physical properties electrical conductivity, dielectric permitivity and magnetic permeability.

Research

The research of section 2 aims on the advancement of existing and the development of new electromagnetic methods. We focus our work on improving the ability to image dynamic processes such as the spatial and temporal variation of the salt/fresh water interface in coastal regions. Further, we develop scale- and method-independent approaches to enhance the reliability of parameter distributions used to inform subsurface modeling. Finally, we deliver high-resolution subsurface models to allows for sedimentological investigations.  

Within the research field of Geoelectrics we target on the dc-resistivity method. Of special interest are large-scale layouts and monitoring experiments as well as developing data interpretation software. The research field surface-NMR advances the technique to conduct NMR experiments by using large coils placed at the Earths surface that allows for deriving hydrological parameter. The Georadar group conducts research in the field of high-frequency electromagnetic wave to investigate groundwater-systems, sedimentological questions and the detection of explosive ordnances.  The developments in the fields of measurement equipment as well as modeling and inversion technqiues are focussed on the above mentioned methods while the modeling and inversion group deals with handling partial differential equations, mainly maxwells-equations. Further they develop modern inverse modeling approaches and data-processing algorithms.

Research fields

Selected current projects

  • DynaDeep
    The Dynamic Deep Subsurface of High-Energy Beaches
  • SIRIUS B
    Simple and rapid imaging of groundwater using magnetic resonance
  • DESMEX 2
    Deep Electromagnetic Soundings for Mineral EXploration
  • Counter-IED 3
    Detection of Improvised Explosive Devices (IEDs) with GPR
  • MoreSpin
    Mobile Magnetic Resonance Sensor with supraconducting coil for prepolarization in the near surface soil

All projects

News & Dates

  • 01.-05.03.2021 Annual DGG conference (virtual)
  • 02.02.2021 Sirius-B: NMR test with dipole receivers
  • 09./10.12.2020 MoreSpin test measurements on BAM test area
  • 21.-30.09. Flight experiments in Gosetal & Bad Grund (Harz mountains) in DESMEX 2
  • 15.07. PhD defense of Raphael Rochlitz in Münster (DESMEX project)
  • 14.07. Finished installation of SAMOS systems in Abickhafe (goCAM project)
  • 24.06. New SAMOS systems running in Spiekeroog with Video (goCAM)

Current publications

  • Monitoring freshwater-saltwater interfaces with SAMOS - installation effects on data and inversion. - Near Surface Geophysics, 18(4): 369-383.
    2020, RONCZKA, M., GÜNTHER, T., GRINAT, M. & WIEDERHOLD, H.
  • Utilizing pre-polarization to enhance SNMR signals - effect of imperfect switch-off. - Geophysical Journal International, 222 (2): 815-826.
    2020, HILLER, T., DLUGOSCH, R. & MÜLLER-PETKE, M.
  • Coupled magnetic resonance and electrical resistivity tomography: An open-source toolbox for surface nuclear-magnetic resonance. - GEOPHYSICS 85 (3), F53-F64.
    2020, SKIBBE, R., ROCHLITZ, R., GÜNTHER, T., MÜLLER-PETKE, M.
  • Magnetic resonance tomography constrained by ground-penetrating radar for improved hydrogeophysical characterisation.- Geophysics 85(6), JM13-JM26, 2020.
    2020, JIANG, C., IGEL, J., DLUGOSCH, R., MÜLLER-PETKE, M., GÜNTHER, T., HELMS, J., LANG, J. & WINSEMANN, J.
  • Non-remote reference noise cancellation-using reference data in the presence of surface-NMR signals. - Journal of Applied Geophysics, 177, 104040.
    2020, MÜLLER-PETKE, M.

Head of department

Staff

Technical infrastructure