Image and info courtesy of NASAs spaceweather: AURORA SURPRISE: Observers around the Arctic Circle were surprised last night when the skies overhead erupted in swirls of verdant color. Rayann Elzein sends this picture from Inari in the Finnish Lapland: Although there was no forecast of strong activity, auroras were dancing high in the sky--very bright and very fast, says Elzein. They were the most breathtaking auroras that I have ever seen up here in Lapland! The unexpected storm, a relatively minor G1-class event, was caused by a fluctuation in the interplanetary magnetic field (IMF). As March 12th turned to 13th, the IMF tilted south, opening a crack in Earths magnetosphere. Solar wind poured in and fueled the display. spaceweather/
Posted on: Thu, 13 Mar 2014 18:51:57 +0000
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