[meteorite-list] Aurora Borealis last night (was: Geminid MeteorShower Count)

[bernd.pauli at paulinet.de]

Good morning Listees and Listoids,

Last night Linton also wrote:

"There were large, shifting areas of pink and purplish colors,
rather than the green which is apparently more common."

Sky & Telescope, July 1981, p. 86:

"Auroras above 240 km (150 miles) are mainly red from light
given off by oxygen atoms. Between 100 and 240 km it is the
green light from oxygen that is most apparent, and below these
altitudes the red and blue light of nitrogen atoms is strongest.
It is likely this latter source was responsible for much of the
April [1981] display."

Cheers,

Bernd