- The lunar surface is covered by regolith.
The Solar wind imparts a charge to the lunar surface
On the daylit side of the Moon, solar ultraviolet and X-ray radiation is energetic enough to knock electrons out of atoms and molecules in the lunar soil
The same article further states
On the night side, the dust is negatively charged by electrons in the solar wind.
Given both sides of Luna acquire an electrical charge,
- Was the magnitude of the acquired charge on either side ever quantified?
- What is the average charge magnitude on either side of the lunar soil?