Importance of initial ionospheric conductivity on substorm onset

Akasofu, 1981, Energy coupling between the solar wind and the magnetosphere, Space Sci. Rev., 28, 121, 10.1007/BF00218810 Akasofu, 1982, Magnetospheric convection at a low level power of ϵ, Planet. Sci., 30, 1057, 10.1016/0032-0633(82)90155-6 Akasofu, 1981, Power transmission from the solar windmagnetosphere dynamo from the magnetosphere to the ionosphere: Analysis of the IMS Alaska meridian chain data, Planet. Space Sci., 29, 721, 10.1016/0032-0633(81)90042-8 Fridman, 1980, Relationship between auroral electron fluxes and field-aligned potential difference, J. geophys. Res, 85, 664, 10.1029/JA085iA02p00664 Kan, 1982, Towards a unified theory of discrete auroras, Space Sci. Rev., 31, 71, 10.1007/BF00349001 Knight, 1973, Parallel electric fields, Planet. Space Sci., 21, 741, 10.1016/0032-0633(73)90093-7 Pellinen, 1982, Event study on pre-substorm phases and their relation to the energy coupling between solar wind and magnetosphere, Planet. Space Sci., 30, 371, 10.1016/0032-0633(82)90043-5 Reiff, 1981, Dependence of polar cap potential drop in interplanetary parameters, J. geophys. Res., 86, 7639, 10.1029/JA086iA09p07639 Rostoker, 1976, A mechanism for driving the gross Birkeland current configuration in the auroral oval, J. geophys. Res., 81, 235, 10.1029/JA081i001p00235