http://www.thunderbolts.info/tpod/2007/arch07/071221lunarphenomena.htmThe Moon is dominated by gigantic circular structures where unusual luminous discharges have been observed. Are they indicative of past electrical events?
For more than a thousand years, reports have circulated about events on the Moon that should not appear on a "dead" celestial body. Various accounts describe glowing clouds in red and green, or sudden outbursts of yellow flares and intense flashes of light. Such observations do not accord with conventional theories.
Because the Moon is thought to have lost all its heat to space more than a billion years ago and it has no magnetic field to speak of, violent activity should not be taking place on its surface today. For this reason, astronomers and astrophysicists have discounted "transient lunar phenomena". Since most of the sightings by single individuals received no corroboration and no images were recorded until recently, the incidents were said to be apocryphal or deliberately misleading.
That leaves open the question of whether transient phenomena on the Moon are in fact real. The question was answered by a recent statistical breakdown indicating the evidence for them and the reports about them are authentic. What could the explanation be for their appearance?
One theory that bears close examination is related to electrostatic charging and discharging of materials on the surface. Triboelectric charging of particles or electrostatic levitation of dust near the lunar terminator might give rise to some luminescence visible to observers on our planet. Several lunar surface features seem best identified with electrical scars from catastrophic encounters in the recent past, so remnant electrodynamic forces might linger in the Moon's environment to this day - especially since the Moon's orbit takes it in and out of the charge sheath that extends outward from Earth.