Fig. 4From: Statistical analysis of the mid-latitude trough position during different categories of magnetic storms and different storm intensitiesSuperposed epoch analysis of Dst index and trough position for CIR (a) and ICME (b) storms using the normalized time line. The solid blue lines indicate the average Dst index. The solid green lines indicate the average trough position. The short vertical lines indicate the range bounded by the upper and lower quartiles. The red vertical lines show the start or end of each phaseBack to article page