A crack in Earth’s magnetic field opened on Februry 18, 2020, sparking some of the strangest auroras in years.
First, blue northern lights lit up the sky over the Lofoten Islands of Norway, before strangely shaped green northern lights electrified the night sky.
What for an amazing picture! The night show lasted 2 hours with a spectacular display of pale green, blue, and purple auroras over the mountains of Reine.
What are blue auroras and how do they form?
Blue auroras are rare.
The most common northern lights are green and red. They are produced when oxygen is excited by electrons raining down from space.
In contrast, blue auroras show the presence of nitrogen (N2+) and form at very high altitudes (> 400 km).
Normally, the blue color is faint, but look again at the pictures above. On February 18, the color was strangely vivid and intense.
Strange-shaped green auroras
A bit later in the night, the auroras turned green again. But they looked completely strange, like a weird rippling aurora arch:
This is the first time this aurora guide had seen such amazing twist. The show was so different than the usual northern lights arcs. Truly magic!
But keep your eyes to the sky. The aurora show isn’t finished yet! A G1-class geomagnetic storm is underway on February 19. So if you are currently stuck up north you could enjoy some pretty wild colors in night sky. More strange sky events on Strange Sounds and Steve Quayle. [SpaceWeather]