Auroras can appear green, pink, dark red, blue, purple and even yellow!
, plays a significant role in determining the intensity, color and frequency of auroral displays. During periods of high solar activity, Earth's atmosphere is bombarded with a higher number of solar particles, increasing the likelihood of more vibrant and varied aurora colors.
The sun's activity fluctuates on an 11-year solar cycle, with periods of peak activity known as solar maxima. Solar activity is now on the rise during the currentWe asked Dr. Elizabeth MacDonald a few frequently asked questions about aurora colors.Dr.
As Earth's atmosphere has more nitrogen compared to oxygen, why aren't blue/purple auroras that are caused by nitrogen the most common? The aurora occurs so high up that the mix of air we are familiar with is not the same as at 100 km. The atmosphere there is much less dense, and stratified by gravity into layers. The nitrogen layer lies above the oxygen layer.It's hard to say because auroral colors blend in an ever-changing chemistry mix and that is how you can get some of the rarer colors that are observed.
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