Figure 4


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The (a) IMF Bz (black curve) and IEF Ey (blue curve), (b) Dst, (c) ΔH, and hmF2 observed at (d) Beijing, (e) Wuhan, and (f) Ledong during 14–15 January 2022. The green shaded areas mark the approximate period of the EPBs. The grey dashed curves represent the monthly mean values. The red horizontal dashed lines in (a)–(c) mark the value of zero.

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