Fig. 6
From: Further evidence for the role of magnetotail current shape in substorm initiation
The minimal substorm AL index (horizontal axis) versus tilt-related values (vertical bars) as follows: dipole tilt (top left panel), effective tilt (top right panel), product of the dipole tilt and SW inclination α (bottom left). Right bottom plot is essentially the same as the top right one, but it includes the substorms that occurred under SW flow velocities below 500 km/s, which are shown by red bars