Monday, February 22, 2016
WeatherWhys for February 22,2016 from accuweather.com
The auroras that caused a beautiful scene in the high latitudes are
caused by collisions between fast-moving electrons from space and the
oxygen and nitrogen in Earth's upper atmosphere. Auroras usually occur
in ring-shaped areas that are roughly 2,500 miles in diameter around the
Earth's poles. The spectacular light show is known as aurora borealis
in the Northern Hemisphere and the aurora australis in the Southern
Hemisphere.
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