20150234073 | METHOD AND SYSTEM FOR MAPPING A GEOLOGICAL STRUCTURE OF A FORMATION ON ONE SIDE OF A SURFACE USING MAGNETIC MOMENTS OF DIFFERENT VALUES - A method for mapping geological structures of a formation on a side of a surface, includes: generating a magnetic moment using at least one magnetic moment generator to build up a magnetic field in the formation in an on-period, wherein the magnetic moment has a moment strength, and wherein the magnetic moment is positioned on another side of the surface; changing the magnetic moment to change the magnetic field; and making at least one record in a recording device at a recording time t | 08-20-2015 |