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Originally Posted by czeslaw
There is no net electric current (direct current) of course, there are only micro oscillations much more frequent then in our fluorescent lamp.
But, if fluorescent lamp do not shine without electric current, then we can’t see an aurora without electric current too.
A direct current is different then alternating current but both of them are electric currents.
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The currents that create the aurora are not currents flowing in the solar wind, but are created by accelerated particles in the Earth's magnetosphere, for example, when a substorm occurs in the magnetotail.
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