Statistical estimates of the average value ofBZin the magnetotail neutral sheet between 10 and 22REinX, and −10 to 10REinY(GSM coordinates) are given for different phases of geomagnetic activity. With few exceptions the average value ofBZis found to be between 5 and 8 nT, but generally near 7 nT, irrespective of the type or phase of activity. This is considerably higher than is predicted in current magnetic field models of the magnetotail. The magnetic field within 2REof the neutral sheet is examined to determine whetherBZremains approximately constant. We do not find this to be true,BZdecreasing significantly over this distance from ΔZ= 0. The structure of the cross‐tail current and variations in current density with substorrn phase appear to be more complicated than is commonly acce