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From Mail Online
A mysterious light display appearing over Norway last night has left thousands of residents in the north of the country baffled.

Within seconds a giant spiral had covered the entire sky. Then a green-blue beam of light shot out from its centre - lasting for ten to twelve minutes before disappearing completely.

The Norwegian Meteorological Institute was flooded with telephone calls after the light storm - which astronomers have said did not appear to have been connected to the aurora, or Northern Lights, so common in that area of the world.
The mystery deepened tonight as Russia denied it had been conducting missile tests in the area.
Maybe the culprit for this phenomena is  the ESCAT. The EISCAT Scientific Association is an international research organisation operating three incoherent scatter radar systems, at 931 MHz, 224 MHz and 500 MHz, in Northern Scandinavia. It is funded and operated by the research councils of Norway, Sweden, Finland, Japan, China, the United Kingdom and Germany (collectively, the EISCAT Associates.)
 
EISCAT (European Incoherent Scattter) studies the interaction between the Sun and the Earth as revealed by disturbances in the magnetosphere and the ionised parts of the atmosphere (these interactions also give rise to the spectacular aurora, or Northern Lights). The radars are operated in both Common and Special Programme modes, depending on the particular research objective, and Special Programme time is accounted and distributed between the Associates according to rules which are published from time to time.

One EISCAT transmitter site consisting of a UHF system and a VHF system is located close to the city of Tromsø, in Norway, and additional receiver stations are located in Sodankylä, Finland, and Kiruna, Sweden. The EISCAT Headquarters are also located in Kiruna. In 1996 the EISCAT Scientific Association constructed a second incoherent scatter radar facility, the EISCAT Svalbard Radar (ESR), near Longyearbyen on the island of Spitsbergen, far to the North of the Norwegian mainland.

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