Aurora colors: What causes them and why do they vary?

How is the Aurora Borealis (Northern Lights) formed? - Quora

Aurora Hunters Capture the Wonder of the Northern (and Southern) Lights - Atlas Obscura

Aurora Hunters Capture the Wonder of the Northern (and Southern) Lights - Atlas Obscura

Magenta Aura Meaning: What Does Your Magenta Aura Color Mean? - Color Meanings

Aurora Borealis in Glacier Bay - Glacier Bay National Park & Preserve (U.S. National Park Service)

What causes the Northern Lights? Aurora borealis explained

What causes colour difference in auroras? - Quora

Why there are Different Aurora Colours Explained by Aurora Nights

The Colors of the Aurora (U.S. National Park Service)