Fig. 2
From: How the intensity of isolated substorms is controlled by the solar wind parameters
Relationship between the solar wind plasma density and velocity for the time intervals of 1 h before (a red dots) and after (b blue dots) substorm onset. The average values of the solar wind density (c) and velocity (d) for substorms of different intensities. The averaging is made 1 h before (red) and 1 h after (blue) onsets. Data are averaged in the 200-nT bins starting from 100 nT