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 of surveying geological structures in a formation, the method comprising:

• transmitting magnetic moments using a transmitter coil, wherein the transmitter coil is configured to conduct a current signal shape during an ON-time period to build up a magnetic field in the formation, wherein the ON-time is followed by an OFF-time period;
• and
• receiving a response from the formation;
• wherein the magnetic moments comprise a first sequence of magnetic moments with at least two ON-time periods having different durations, followed by a second sequence of magnetic moments with at least two ON-time periods having different durations.

A measuring equipment for surveying geological structures in a formation comprising:

• a transmitter configured to transmit magnetic moments using a transmitter coil, wherein the transmitter coil is configured to conduct a current signal shape during an ON-time period to build up a magnetic field in the formation, wherein the ON-time is followed by an OFF-time period;
• and
• a receiver configured to receive a response from the formation;
• wherein the magnetic moments comprise a first sequence of magnetic moments with at least two ON-time periods having different durations followed by a second sequence of magnetic moments with at least two ON-time periods having different durations.