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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: How variable are Birkeland currents?

Fig. 1

Space series and all-sky imagery from a Swarm overflight of the Fort Yukon THEMIS site on 1 December 2013 at 10:42:01 UTC. The dashed line in the middle panel marks where Swarm A measured a downward current density of \(\sim 1.0\ \mu \,\hbox {A}/\hbox {m}^{2}\) about 14 s after Swarm B measured an upward current density of \(\sim 0.3\ \mu \,\hbox {A}/\hbox {m}^{2}\)

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