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Fig. 2

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As in Figure 1, the linear regression of I6[aa] integrated over the descending phase of each solar cycle versus the sunspot peaks of the following cycle. The expected peak of SC 25 is represented by the red circle (confidence level is obtained as root mean square error). Green circle represents SC 24 forecasted by using the regression computed over SCs from 14 to 23 (represented by the green line).

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