Advances made in determining magnetospheric current systems



One of the important purposes of the discipline of geomagnetism is to determine how the electric current systems that cause geomagnetic disturbances develop and understand their driving processes, in terms of the solar wind-magnetosphere interaction. Researchers in geomagnetism have made important progress by combining ground-based and satellite-based observations with associated computer modeling efforts. In particular, we are now able to infer the changing distribution of electric currents on the equatorial plane within about 10 Earth radii with a time resolution of 5–10 min.