At any rate, lighting itself has been shown to make these types of figures far up in the sky. Sprites. A recent discovery. Now could these sprites become more visible if the magnitude of the lighting increased ?
Characteristics for the Occurrence of a High-Current Z-Pinch Aurora as Recorded in Antiquity Part II: Directionality and SourceThis is at www.scribd.com and, if I remember correctly, has simulations of what would be seen in the sky at different orientations on the earth as well as a view from space of the earth enclosed in a cage of Birkeland currents.
Try HEREAnd a third link in case those two don't work:
THIRD LINKHere also is a website that is about the possibility of a much more active sky in neolithic times that could have formed the basis of much celestial-related mythology.
Introducing Plasma MythologyThere are links to many papers on this site.