Fig. 3


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Data from the selected events: 28 October 2019, 29 January 2020, and 22 February 2020 from 18:00 to 24:00 UT. In panels a, e, and i, the horizontal magnetic field component Bx is shown. The dips indicate substorm events at the respective stations (NYA – red, LYR – green, HOP – black, BJN – orange, HOR – blue). Panels b, f, and j show the 557.7 nm emissions intensity observed by the LYR ASC in form of a keogram. The bright auroral emissions correspond to times of particle precipitation. Panels c, g, k and d, h, l show σϕ and S4 scintillation index data recorded by the scintillation receivers in the respective stations. They quantify the location, scale, and intensity of plasma structuring.

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