The aurora borealis is originated from the interaction of electrically charged particles emitted by the sun (such as protons and electrons) with the Earth's ionosphere, ie the outermost layer of our atmosphere. The field Earth's magnetic causes the aurora borealis, but would be more correct to call it the polar aurora, is visible at very high latitudes in the direction of both poles. Iceland is therefore vantage point for observing this phenomenon ...
The Northern Lights are most visible and frequent during magnetic storms occurring on the surface of the sun. These "storms" are directly related to the activity of sunspots, regions of the solar surface that appear dark because the colder surrounding areas. After years of low magnetic activity of the sun it is time for its strong recovery. The solar magnetic activity follows Indeed cyclicity of about 11 years. The historical analysis of the physical causes of the sun is beginning to believe that the cycle 24. If that were the solar magnetic activity is expected to increase significantly in coming years giving us spectacular auroras as was the case until about three years ago.
February 13 was observed on the surface of the sun, a huge "rash" from a group of sunspots called 1158. It 's the largest "solar flare" of the last four years. The flow of energy caused interference in telecommunications in many parts of Asia, especially China. A few hours after the beginning of the event spectacular auroras were observed polari a latidudini elevate in tutto l'emisfero boreale. Si tratta di un ottimo auspicio per il nostro viaggio in partenza il 20 agosto 2011.
Il filmato ritrare la superficie del sole ripresa il 13 febbraio 2011
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