In the explanation race I’m voting for time travelers, we all have seen the crazy-looking portals and vortexes in the movies. Here’s a bit from the Daily Mail, where some “scientists” speculate it was a Russian missile test:
Tromsø Geophysical Observatory researcher Truls Lynne Hansen was certain the light had been caused by a missile launch. He told Norwegian media that the missile had likely lost control and exploded. The spiral, he claimed, was the result of light reflecting on the leaking fuel. He was quoted as saying the light was sunlight, despite the strange lights showing up at night.
The Barents Observer quoted Norwegian Defence spokesman Jon Espen Lien as saying that the Norwegian military does not know what the lights were — but that they were probably from a Russian missile. He said it was normal for Russia to use the White Sea and the Barents Sea as a testing ground for missiles.
C’mon, time travel is so much more fun…