Electric currents and magnetic fields of a plasma inhomogeneity located in the inner magnetosphere

In the approximation of a dipole geomagnetic field analytical expressions are obtained which connect the longitudinal currents with the magnetospheric plasma pressure. The Earth's magnetic field variations are calculated versus the current system related with a plasma inhomogeneity. The Dessler-Parker-Skobke theorem is generalized for a case of an arbitrary distribution of plasma in the inner magnetosphere at a uniform ionospheric conductivity. The Dsub(st)-index in the first approximation permits to observe the energy inflow to the magnitoshpere or variations in the solar wind pressure