Uwe Meyer¹, Michael Becken², Christian Nittinger², Maria Cherevatova², Annika Steuer¹, Stephan Costabel³, Wiebke Moerbe⁴, Pritam Yogeshwar⁴, Bulent Tezkan⁴, Raphael Rochlitz⁵, Thomas Guenther⁵, Markus Schiffler⁶, Ronny Stolz⁶ and DESMEX Working Group, (1)BGR Federal Institute for Geosciences and Natural Resources, Groundwater and Soil - Geophysical Exploration and Technical Mineralogy, Hannover, Germany, (2)University of Münster, Institute of Geophysics, Münster, Germany, (3)Federal Institut for Geosciences and Natural Resources, Groundwater and Soil - Geophysical Exploration and Technical Mineralogy, Berlin, Germany, (4)University of Cologne, Institute of Geophysics and Meteorology, Cologne, Germany, (5)Leibniz Institute for Applied Geophysics, Geoelectrics and Electromagnetics, Hannover, Germany, (6)Leibniz Institute of Photonic Technology, Magnetometry, Jena, Germany