April 10, 2000. Last week a spectacular dawn shone in the northern skies. This aurora was caused by a large wave of interplanetary shock that emerged from the Sun on April 4.
When the shockwave hit Earth on April 6, the resulting aurora could be seen in clear skies as far as in southern North Carolina.
The auroras originate in the high terrestrial atmosphere and they are accompanied by an unusual planetary alignment. In the photograph, a rare multicolored aurora unfolds over the domes of the Brno Observatory in the Czech Republic.
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