Magnetic methods measure contrasts in the earth’s magnetic field across an area of interest. Contrasts may be caused by variations in concentrations of naturally occurring ferrous minerals or buried ferrous metals. Although magnetic methods are typically robust, their use is limited in urban areas due to the presence ferrous utilities and structures.

Typical applications of magnetic methods include:

  • Location of buried ferrous materials (steel well casings, tanks and pipes)
  • Waste pits and landfill detection and delineation
  • Buried ordnance detection (UXO)
  • Geologic mapping and fault studies
  • Archeological investigations