Substorms associated with different flows in the solar wind

Substorm disturbances are investigated at periods of magnetic clouds (MC) and recurrent solar-wind flows. The substorms associated with MC are shown to commence at lower latitudes than those related to recurrent flows. The longitudinal size of the auroral bulge is bigger, and the latitudinal one is smaller for the substorms at MC periods. The influence of solar-wind parameters (solar wind velocity V and south component of the interplanetary magnetic field Bs) on development of the bulge is different. During recurrent fluxes, V and Bs increase results in increase of the mean maximal latitude of the substorm. During MC, V and Bs increase leads to decrease of the maximal latitude of the substorm. We assume that these discrepancies may be explained by different configuration of the magnetospheric tail during storms and quiet intervals. The research results agree with some works, which demonstrate that preferred conditions for occurrence of substorms at the high latitudes are recurrent solar-wind flows, which are observed for the most part in decay and minimum phases of solar activity.