Cross sections of the tail from the BATSRUS model runs showing the magnetic field intensity, B. The rows are for X _GSM (=X _GSE) of (from top to bottom) −10 R _E, −15 R _E, −20 R _E, and −25 R _E. The columns are for dipole tilts ϕ of (left) +35°, (middle) 0 and (right) −35 °. The outer ring is the bow shock and the two tail lobes, separated by the low-field plasma sheet can be clearly seen. At all X _GSM, the field in the “winter” lobe (south for ϕ = +35°, north for ϕ = −35°) is similar to that for the ϕ = 0 case (and sometimes very slightly enhanced), whereas for the “summer” lobe (north for ϕ = +35°, south for ϕ = −35°) it is always considerably lower.