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auroral oval. auroral oval. An oval-shaped region centered on the earth's magnetic pole in which auroral emissions occur.
Auroras that occur in the northern hemisphere are called âAurora Borealisâ or ânorthern lightsâ and auroras that occur in the southern hempishere are called âAurora Australisâ or âsouthern lightsâ. Both Auroraâs can be seen in the northern or southern hemisphere, in an irregularly shaped oval centred over each magnetic pole.