Birkeland current

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Notion

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Science and technology

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What Wikipedia says

A Birkeland current (also known as field-aligned current, FAC) is a set of electrical currents that flow along geomagnetic field lines connecting the Earth's magnetosphere to the Earth's high latitude ionosphere.

Excerpt from the Wikipedia article “Birkeland current”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Le, G., J. A. Slavin, and R. J. Strangeway, GFDL, via Wikimedia Commons.