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Fig. 5.

image

Panels (from top to bottom): unsigned values of solar magnetic fields, obtained from NSO/KP (solid curve in red), SoHO/MDI (dashed curve in blue), and HMI (dotted curve in green) magnetograms, in the latitude ranges, poleward of 78° in the north, 0°–45° in the north, 0°–45° in the south, and poleward of 78° in the south, respectively, for solar cycles 23–24. The hemispheric smoothed sunspot number is shown in solid black curve overplotted in the second (north) and third (south) panels. The hemispheric asymmetry in solar activity in cycle 24 is evident with the south showing one activity peak (Jun 2014), while the north showing double activity peaks (Jan. 2012 and Nov. 2014). It is also clear from the first and fourth panels that the polar reversal process in the north in cycle 24 is slow and seems to be completed in Nov. 2014, while in the south, it is faster and has been completed in early 2014. The occurrence and completion of polar reversal process happening around the solar cycle maximum is evident from the figure.

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