Volume 42 Number 8
  • E-ISSN: 1365-2478



A method of non‐invasive NMR in the earth's field has been developed and is now used for groundwater surveys to depths of investigation of 100 m or more.

A circular wire loop of diameter 100 m, laid out on the ground, is employed to excite and receive the NMR signal in the earth's field. However, in areas with high electromagnetic noise, the NMR measurements may be inaccurate.

To overcome this problem, a noise‐reducing figure‐of‐eight‐shaped antenna, consisting of two touching coils each of diameter 50 m, has been utilized.

Using this antenna, the NMR signal has been calculated for different depths of water‐saturated layers with various inclinations of the geomagnetic field. The model calculations and experimental data have been compared and found to be mutually consistent. The two‐coil antenna is shown to be suitable for studies at depths of up to 30–40 m, which is of practical importance for engineering geology.


Article metrics loading...

Loading full text...

Full text loading...


  1. AbragamA.1961. The Principles of Nuclear Magnetism. Oxford University Press.
    [Google Scholar]
  2. SemenovA.G.1987. NMR Hydroscope for water prospecting. Proceedings of a seminar on Geotomography, pp. 66–67. Indian Geophysical Union.
    [Google Scholar]
  3. SemenovA.G., BurshteinA.I., PusepA. Yu. and SchirovM.D.1988. A device for measurement of underground mineral parameters (in Russian). USSR Patent 1079063.
  4. SemenovA.G., SchirovM.D., LegchenkoA.V., BurshteinA.I. and PusepA. Yu.1989. A device for measuring the parameters of an underground mineral deposit . GB Patent 2198540.
  5. SchirovM.D., LegchenkoA.V. and CreerJ.G.1991. New direct non‐invasive groundwater detection technology for Australia. Exploration geophysics22, 333–338.
    [Google Scholar]
  6. TrushkinD.V., ShushakovO.A. and LegchenkoA.V.1993. Modulation effects in non‐drilling NMR in the earth's field. Applied Magnetic Resonance5, 399–406.
    [Google Scholar]
  • Article Type: Research Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error