This is an image of the aurora of Jupiter, with connecting field lines.
J. Connerney
Current Systems of Jupiter
Scientists are still studying Jupiter's currents to understand them completely. Currents in a magnetosphere are like arteries in the human body. They are the manifestation of particles being carried from one region to another. Currents are a very important part of the interaction of the solar wind, the magnetosphere, and a planet's atmosphere.
The most powerful currents in the magnetosphere are those which power the Jovian aurora. As shown in the figure, the Jovian aurora is thought to come from two sources, Field-Aligned currents (FAC's) from the moon Io, and from currents carrying particles from somewhere deeper in Jupiter's magnetotail.
If you would like to know a little bit more about current systems, why not look at current systems in the Earth's magnetosphere.
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