And, Sparteye, I've heard of these keraunographs, although I hadn't heard this word before. But I have heard of people standing before a glass window where a bolt of lightning has caused an image to be left there on the glass.


However, there are myths about impressions of trees left on people's skin. What is actually left on the skin of people hit by lightning is apparently a tracing of the moisture on their skin into a tree-like pattern.

I do wish someone could find the etymology of ceraunograph...