Topical Issue - Space Weather research in the Digital Age and across the full data lifecycle
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Research Article

Fig. 2

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The SYM-H time series (upper panel), the empirical modes , , , and (middle panels), and the residue (lower panel). The green and red lines refer to the quiet and the disturbed period, respectively. The dashed gray line is used as a reference to SYM-H = 0 nT.