Lunar halo and aurora: bright duo

The Earth is inside a stream of solar wind flowing from a coronal hole in the Sun. The wind speed currently exceeds 500 km/s. It is not enough to cause a geomagnetic storm, but enough for Arctic auroras. Sacha Layos captured the green glow next to an amazing lunar halo when he was in Circle City, Alaska.

© Sacha Layos
«This is my second year of volunteering for the 1,000 mile Yukon Quest’s Circle City checkpoint which is nestled deep in interior Alaska close to the Canadian border,» Layos said.
«The second night I was there, a 22 degree Moon halo appeared above the dog yard. I watched it with joy when the aurora suddenly and briefly picked up! My sleep-deprived eyes sure were happy to see two of my favorite celestial events.»


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