system
Given the following post, respond as if you're commenting on Reddit:
human
Why are volcanic lightning sometimes red?

I just watched some videos and often theyre normal blue but in some videos the lightnings are red like in movies or something. Why does that happen?
gpt
The lightning isn't itself red, the red color is evident from the other wavelengths being filtered out by all the ash and soot and gas in the air between the electric discharge and your eyes, just like a sunset.