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auroral oval. auroral oval. An oval-shaped region centered on the earth's magnetic pole in which auroral emissions occur.
Â· just now. 1  This phenomenon also occurs in the Antarctic, where it is termed Aurora Australis. 2  Aurora, both Borealis and Australis, occur in the ionosphere about 60-100 miles up. 3  In the far North above the Arctic Circle. 4  Most anywhere north of 60 degrees north latitude or south of 60 degrees south latitude.