31 Spreiter, J. R. and B. J. Hyett, The effect of a uniform external pressure on the boundary of the geomagnetic field in a steady solar wind, J. Geophys. 32 Spreiter, J. R., A. L. Summers, and A. Y. Alksne, Hydromagnetic flow around the magnetosphere, Planet. 33 Tsyganenko, N. A. and D. G. Sibeck, Concerning flux erosion from the dayside magnetosphere, J. Geophys. Southward and northward interplanetary magnetic field, J. Geophys. The positive x axis lies along the aberrated magnetotail axis and points sunward.
R is the radial distance from the it x axis.
Distances are measured in Earth radii.