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Fig. 5

image

Cumulative values of FISXR (top panel) and sunspot area (bottom panel) for the northern (solid line) and the southern (dotted line) hemispheres during solar cycle 21, 22, and 23. In this representation, the vertical distance between the two curves (i.e., solid and dotted lines) at any time characterizes the north/south excess up to that epoch.

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