Time-of-year (F) – UT plots based on the dependencies on ϕ shown in Figure 6 for IMF B _z = −6 nT and solar wind dynamic pressure, p _SW = 1.5 nT. For comparison (a) shows the Russell-McPherron pattern of IMF orientation factor sin⁴(θ/2) for unit IMF in the +Y or the −Y direction of the GSEQ frame (where θ is the IMF clock angle in the GSM frame). (b) shows the F-UT pattern of the dipole tile angle ϕ. (c) The peak northern hemisphere lobe field along the hinge angle bisector, B _N. (d) The peak southern hemisphere lobe field along the hinge angle bisector, B _S. (e) The peak magnetic shear across the current sheet at the hinge point, ΔB = B _N + B _S. (f) The fractional rise Δ_TL in total energy stored in the tail (between X _GSE = −50 R _E and X _GSE = −5 R _E) compared to for IMF B _z = 0.