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1. Graphic showing color and source of emissions at various altitudes 2. Emission spectrum of Atomic Oxygen 3. Emission spectrum of Molecular Nitrogen Source for 1 - https://www.flickr.com/photos/11304375@N07/2844511020/in/photostream/ Source for 2 and 3 - http://ffden-2.phys.uaf.edu/webproj/212_spring_2015/Joyce_Dustin_Demientieff/joyce_dustindemientieff/colors.html More info about aurora colors at https://en.wikipedia.org/wiki/Aurora and https://www.nps.gov/articles/-articles-aps-v8-i1-c9.htm

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1. Graphic showing color and source of emissions at various altitudes 2. Emission spectrum of Atomic Oxygen 3. Emission spectrum of Molecular Nitrogen Source for 1 - https://www.flickr.com/photos/11304375@N07/2844511020/in/photostream/ Source for 2 and 3 - http://ffden-2.phys.uaf.edu/webproj/212_spring_2015/Joyce_Dustin_Demientieff/joyce_dustindemientieff/colors.html More info about aurora colors at https://en.wikipedia.org/wiki/Aurora and https://www.nps.gov/articles/-articles-aps-v8-i1-c9.htm
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AkaSci 🛰️ (akasci@fosstodon.org)'s status on Wednesday, 14-Aug-2024 11:14:49 JST AkaSci 🛰️
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Why do some auroras produce vivid pink colors?
Auroras are caused by emissions from O atoms and N2 molecules. Solar-origin electrons cause the energy states of O and N2 to rise which result in photon emissions at specific wavelengths.
O atoms below 200 km emit in the familiar green color.
O atoms above 200 km emit in red.
N2 near 200 km emits in blue.
N2 below 100 km emits in reds and blues that mix to produce pink.
Intense solar storms cause lower altitude N2 emissions.
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