A little Aurora Borealis out the front against the Maple tree's....... First time i managed to capture it ... finally no clouds! The red aurora is not fully understood.
Rare, all-red auroras occur much higher, at 300 to 500 kilometers altitude and are associated with a large influx of electrons. These electrons are moving too slowly to penetrate deeply into the atmosphere: they actually have less energy than the electrons that create more common auroras.
At this high altitude, the electrons lose their energy only to the most abundant constituent, oxygen atoms. The process produces light as pure as that from a laser; there's no mixture of colors to confound the eye. Instead, light is produced at exactly 6300 and 6364 angstrom units on the spectrum, and we see true red aurora.
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