Auroral oval

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auroral oval

An elliptical band around each geomagnetic pole ranging from about 75° magnetic latitude at local noon to about 67° magnetic latitude at midnight under average geomagnetic conditions. Those locations experience the maximum occurrence of aurorae. The aurora widens to both higher and lower latitudes during the expansion phase of a geomagnetic substorm.

Space Weather Prediction Center, 2018: Aurora. Accessed 13 August 2018. Available at https://www.swpc.noaa.gov/phenomena/aurora.


Term edited 13 August 2018.

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