Derivation of currents and diamagnetic effects from global plasma pressure distributions obtained by IMAGE/HENA E.C. Roelof, P.C. Brandt and D.G. Mitchell The global ion distributions inverted from ENA images measured by IMAGE/HENA can be used to calculate the plasma pressure. In principle, knowing the plasma pressure distribution and the magnetic field, one can also calculate the three-dimensional current system that is driven by the pressure gradient. The currents perpendicular to the magnetic field depend on the pressure gradient and the magnetic field strength. Assuming current continuity (del J = 0), the parallel currents are driven by the divergence of the perpendicular current. We will describe a method where we use Euler potentials to calculate the current distribution. The method will then be applied to some pressure distributions measured by IMAGE/HENA and the resulting field aligned currents (FAC) will be compared to the global FAC maps derived from Irridium magnetometer data. _______________ Advances in Space Research, 33 (5), 747-751, 2004