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auroral oval. auroral oval. An oval-shaped region centered on the earth's magnetic pole in which auroral emissions occur.
An aurora is a natural electric phenomenon that creates bright and colorful light displays in the sky. They are common at higher latitudes, mostly within the Arctic and the Antarctic Circles. Aurora borealis in Michigan, USA. The northern lights can be green, pink, red, blue or violet in color. Â©iStockphoto.com/Constance McGuire. In the Arctic Circle, they are known as aurora borealis or the northern lights, while in the Antarctic Circle they are called aurora australis or the southern lights.