Storm‐time electric field distribution in the inner magnetosphere

摘要: [1] The distribution of the storm-time electric field in inner magnetosphere has been investigated by using Akebono/EFD data within a period from 1989 to 1995. During main phase geomagnetic storms, strong appears between L = 2 and 6 both dawn dusk sectors with magnitude 4 mV/m, maximum value at 3 sector. recovery weakly disturbed period, region intense moves outward decreasing amplitude. This structure localized is quite different Volland-Stern model, suggesting existence another source other than large-scale convection field. quiet periods, although fairly follows corotation field, 3.5 indicates small deviation pure corotation.