Fig. 5
From: Two current systems in the preliminary phase of sudden commencements in the magnetosphere
Overall picture of the type L current system connected to the ionosphere in the northern hemisphere, as seen from the Sun at t = 5.5 min. This figure shows the type L current system from the post-noon ionosphere (the same as that in Fig. 3) and that from the pre-noon ionosphere. The type L current from the pre-noon ionosphere goes to the magnetosheath in the southern hemisphere. The 3D equi-contour of the pressure seen from the Sun is shown with volume rendering. The equi-contour roughly indicates the magnetopause. The black arrow in the right indicates IMF direction