From time to time they fly overhead, have you ever wondered what they are and what they are doing?
If you live in a mineral rich area its more likely to see an airborne geophysics airplane.
or even a helicopter dragging this weird contraption around.
They are filled with very precise instruments and are busy taking detailed measurements in the changes in gravity strength and other metrics below them.
This enables them to produce the following types of maps of the surveyed area.
This helps pinpoint minerals and other ore bodies quickly because it highlights the differences in gravity profile and hence densities and probable makeup of rocks.
The great thing about it is it can detect ore bodies and mineralizations even under many feet of soil and vegetation.