0 related to the light in the sky of an aurora (= a natural appearance of coloured light in the sky):
An auroral footprint is created by a river of electric current flowing between Jupiter and its volcanic moon, Io.
A violent solar flare causes a much wider auroral ring that can sometimes be seen as far as the equator.
Dynamics of auroral belt and polar geomagnetic disturbances.
During magnetospheric disturbed conditions, this conductivity enhancement becomes much larger, and the auroral regions move equatorward.
Secondly, the horizontal electric field in the auroral ionosphere is also larger than that at lower latitudes.
Growth of the auroral region to the north was by addition of new lines developing from west to east.
The high-level auroral activity may lead to formation of complex hydrocarbon molecules that are carried toward the equator.
