... Aurora in Red and Yellow . ... Credit Copyright: Jan Safar ( Brno Observatory ) Explanation: The past week brought some spectacular aurora to northern skies. ... When the shock wave reached the Earth on April 6, the resulting aurora could be seen in clear skies as far south as North Carolina . ... Pictured above that night, an unusual multicolored auroral display graced the skies above the domes of the Brno Observatory in the Czech Republic . ... Publications with keywords: aurora - solar activity ....