| Answer | Crossword Clue |
|---|---|
| aeromagnetic | relating to study of the earth's magnetic field esp from the air |
| thermoremanent | relating to magnetic remanence (as in a rock cooled from a molten state or in a baked clay object containing magnetic minerals) that indicates the strength and direction of the earth's magnetic field at a former time |
| aeromagnetic | Relating to or denoting the measurement of the earth's magnetic field using airborne instruments |
| gradiometer | An instrument for measuring the gradient of an energy field, esp. the horizontal gradient of the earth's gravitational or magnetic field |
| gradiometers | An instrument for measuring the gradient of an energy field, esp. the horizontal gradient of the earth's gravitational or magnetic field |
