Fig. 2
Distribution of a) the magnetic flux imbalance between opposite polarities | Φnet | ; b) the total photospheric free magnetic energy Efree; c) the length of the magnetic neutral line with a steep horizontal magnetic gradient LNL; and d) the area with strong magnetic shear AΨ of the SARs and FARs. Each plus and triangle represents the value of an SAR and an FAR with error bars, respectively. The dash-dotted lines represent the cut-off value of each parameter.
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