Photo: Jan-Petter Jørgensen
Holy s***t! Is that a distant galaxy seen through a worm hole or what?!
The event lasted for a few minutes and people were able to take photos and even video footage on it, posted promptly to the YouTube among other media.
Since this was observed mainly in Tromsø, some people thought it was an EISCAT experiment. They found my name & contact info from the EISCAT website --- and started to email me. A lot. If you google "Antti Kero + spiral", you might find some quite dodgy conspiracy websites...
It turned out, however, that the spiral didn't actually take place in Norway at all, but above Kola Peninsula, Russia. The spiral itself was caused by exhaust gasses of a failed Russian "Bulava" test missile precessing like a garden hose. The gas trail was illuminated by the sunrise, making the spiral nicely visible against the dawn skies of Northern Norway.
According to a recent paper by Alexander Kozlovsky (SGO) et al., the Bulava explosion fragments were, in fact, detected by SGO ionosonde and meteor radar ~2 hours later, please have a look:
|SGO ionosonde (a-b) and meteor radar (c-f) data showing ionospheric effects of the missile explosion. Vertical dashed lines indicate time of the explosion occurred 500 km to east.|
Kozlovsky reports: "The Russian military Bulava missile is a three-stage solid propellant 36-tonnes ballistic rocket. On December 9, 2009 a test launch was performed from a submarine located in the White Sea. Because of a technical problem with the second stage, the missile was self-destroyed near 200 km altitude over the Kola Peninsula (north-west of Russia) soon after the launch. It happened at about 07 UT, which corresponds to sunrise. Illuminated by the Sun the combustion products of the fragments of the rocket formed a spiral, which was observed on the dawn sky in northern Norway."