Fig. 6


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The aurora shown in this figure is classified as bands. The projection of the 557.7 nm emissions shown together with the phase scintillation index σϕ over a map of Svalbard and geographical longitude/latitude on 22 February 2020 as seen from the LYR ASC for different time instances. Brighter yellow auroral emissions mean stronger intensity and bigger markers mean stronger σϕ. The markers represent σϕ measurements from NYA in red, LYR in green, HOR in cyan, HOP in magenta, and BJN in orange. Panel a shows a band-shaped Aurora and elevated σϕ values west-ward. Panel b shows the intensified band, no with even stronger σϕ values. Panels c and d show the fading of the auroral band, however σϕ is still elevated. Panel e shows the commencement of the next auroral band, yet without strong elevated σϕ values. Panels f and g show stronger auroral emissions paired with elevated σϕ values at the boundary of the auroral band. In panel h elevated σϕ is observed poleward of the fading auroral band.

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