The Norwegian spiral anomaly of 2009 appeared in the night sky over Norway on 9 December 2009.
The light could be seen in all of Trøndelag to the south and all across the three northern counties which compose Northern Norway, as well as from Northern Sweden and it lasted for 2–3 minutes.
A similar, though less spectacular event had also occurred in Norway the month before. Both events had the expected visual features of failed flights of Russian SLBM RSM-56 Bulava missiles, and the Russian Defense Ministry acknowledged shortly after that such an event had taken place on 9 December.
Russian defence analyst Pavel Felgenhauer stated to AFP that “such lights and clouds appear from time to time when a missile fails in the upper layers of the atmosphere and have been reported before … At least this failed test made some nice fireworks for the Norwegians.”
Further reading: Universe Today – What was the Norway Spiral? (with videos)