What causes the different colours in the aurora?
Different gases give off different colours when they are heated. The same process is also taking place in the aurora.
The two primary gases in the Earth’s atmosphere are nitrogen and oxygen, and these elements give off different colours during an aurora display.
The green we see in the aurora is characteristic of oxygen, while hints of purple, blue or pink are caused by nitrogen
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The display of colors
The colours of a aurora boralis are pink, green, yellow, blue, violet, and occasionally orange and white.
- When the particles mix with oxygen, yellow and green are produced.
- When the particles interact with nitrogen, red, violet, and blue colours are produce...
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