Which gas and altitude combination is responsible for the most common auroral color, green?

Answer

Oxygen struck at lower altitudes (around 100 to 300 km)

Oxygen atoms are responsible for the most common auroral colors. When oxygen is struck at lower altitudes, generally between 100 and 300 kilometers, the resulting light produced is a vibrant green.

Which gas and altitude combination is responsible for the most common auroral color, green?

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What Is an Aurora? - YouTube

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