The region, c.15–30° from each magnetic pole, with the greatest frequency of aurorae. The maximum frequency of aurorae at the zenith lies c.22.5° from the magnetic poles.
Auroral zone The auroral zones form rings, roughly centred on the geomagnetic poles, whose approximate positions are shown. The greatest annual frequency of overhead aurorae occurs around the dashed lines.
Subjects: Meteorology and Climatology.