Fig. 2.
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Sunspot number variation during solar cycle 24. Running average over the four CRs is shown with a solid black line for the total SSN, with a dashed red line for the NH, and with a dash-dotted blue line for the SH. The vertical marks numbered from 1 to 9 show points of interest, which are described in the main text. Data source: WDC-SILSO, ROB, Brussels.
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