Materials of different densities within the ground cause local variations in the earth’s gravitational field. The measurement of these local variations can enable mapping of features including fault zones, voids (including caves, mine-workings and basements), along with shallow rock and buried walls. Microgravity can be used to detect both natural geological features and man-made features. On a larger scale the technology can be used to detect large geological features such as hydrocarbon traps, geothermal energy or groundwater stores.

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GBG investigates a wide range of structures from historically significant buildings to small private residences.

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