Impact of solar wind parameters on latitude variations of auroral electrojet centers

In order to know more about the magnetospheric energy input's effect on the latitude variations of auroral electrojet center,the relations of the latitude variations of west and east auroral electrojet with interplanetary magnetic Bz component(IMF Bz),solar wind velocity,and estimated power input(EPI) of auroral particles are studied respectively.The data of SuperMAG,OMNI and EPI from 1998-2006 are employed.The main results are:(1) As Bz0,the more Bz enhances,the lower the latitudes of west and east auroral electrojet centers are.Meanwhile,the west electrojet center shift to dawn side and east electrojet center to noon.(2) For Bz0,electrojet centers are mainly controlled by the solar wind velocity.Their centers are also migrating equatorward as the velocity grows faster.(3) The characteristics of auroral electrojet center obtained by its strength are consistent with the results got by EPI data.