Aurora Borealis

f2.8 @ 10 seconds, ISO:1250, Nikon D3S w 14-24mm @ 14mm

\"Aurora, \"Wikipedia, the free encyclopedia.An aurora is a natural light display in the sky (from the Latin word aurora, \"sunrise\" or the Roman goddess of dawn), predominantly seen in the high latitude (Arctic and Antarctic) regions. Most auroras occur in a band known as the auroral zone, which is typically 3° to 6° wide in latitude and between 10° and 20° from the geomagnetic poles at all local times (or longitudes), but most clearly seen at night against a dark sky. A region displaying an aurora at any given time is known as the auroral oval, a band which is displaced towards the nightside of the Earth. The day-to-day positions of the auroral ovals are posted on the internet. A geomagnetic storm causes the auroral ovals (north and south) to expand, and bring the aurora to lower latitudes. In northern latitudes, the effect is known as the aurora borealis (or the northern lights), named after the Roman goddess of dawn, Aurora, and the Greek name for the north wind, Boreas, by Galileo in 1619.

Brooks Range, Alaska

10/08/2014