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Fig. 13 | Earth, Planets and Space

Fig. 13

From: Two current systems in the preliminary phase of sudden commencements in the magnetosphere

Fig. 13

Type H and L current systems at t = 5.5 min colored according to \(\frac{{\nabla }_{\perp }\cdot {{\varvec{J}}}_{i}}{JB}\) values in the same manner as in Fig. 3. The current lines are shown only in the area of \(\beta\)<0.2. The type L current from AH is not shown in this figure. There are three characteristic regions of the FPC–FAC conversion. The negative and positive \(\frac{{\nabla }_{\perp }\cdot {{\varvec{J}}}_{i}}{JB}\) in regions (1) and (2), respectively, appears in the boundary between the outer and inner magnetosphere. The region (3) is located in the lower magnetosphere

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