Luci nel cielo by PG&CH on Flickr.

Luci nel cielo by PG&CH on Flickr.

Solar Storm by antonyspencer on Flickr.

Solar Storm by antonyspencer on Flickr.

Solar Storm by antonyspencer on Flickr.

Solar Storm by antonyspencer on Flickr.

Treetop Aurora, Sweden by antonyspencer on Flickr.

Treetop Aurora, Sweden by antonyspencer on Flickr.

Norwegian Woods by Ole C. Salomonsen on Flickr.

Norwegian Woods by Ole C. Salomonsen on Flickr.

Luminous Pond by Ole C. Salomonsen on Flickr.

Luminous Pond by Ole C. Salomonsen on Flickr.

Tease by Storm’sEndPhoto on Flickr.

Tease by Storm’sEndPhoto on Flickr.

Warming up…. by Storm’sEndPhoto on Flickr.

Warming up…. by Storm’sEndPhoto on Flickr.

Reflection. by Iurie Belegurschi on Flickr.

Reflection. by Iurie Belegurschi on Flickr.

“Fire in the sky” by Geirix on Flickr.

“Fire in the sky” by Geirix on Flickr.

It really was a storm…. ! by ツ Kj Photography ツ on Flickr.

It really was a storm…. ! by ツ Kj Photography ツ on Flickr.

Revontulia illalla 22-01-2012 by Janne. on Flickr.

Revontulia illalla 22-01-2012 by Janne. on Flickr.

Revontulia illalla 22-01-2012 by Janne. on Flickr.

Revontulia illalla 22-01-2012 by Janne. on Flickr.

Star Trails and Northern Lights by Bryan Hansel on Flickr.

Star Trails and Northern Lights by Bryan Hansel on Flickr.

Auroral Corona by antonyspencer on Flickr.

Auroral Corona by antonyspencer on Flickr.