Relating to the magnetic properties of the atmosphere or to the measurement of Earth's magnetic field from aircraft.
From 'aero-' (air) + 'magnetic' (relating to magnetism). Developed in mid-20th century as aviation and geophysics combined, allowing scientists to map Earth's magnetic field from above.
Aeromagnetic surveys revealed hidden mineral deposits and oil fields by detecting subtle magnetic variations—it's like using X-ray vision to see underground resources from a flying airplane.
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