Dayside Magnetosphere-Ionosphere Solar Wind Driven Dynamics

oDynamical equations are derived for the dayside region 1, region 2, and magnetopause current loops associated with solar wind compressions of the magnetopause stand off distance. The geometry for the loops is determined first with analytical models and then compared with the Tsyganenko 2005 model. The model predicts from solar wind plasma data the motion of the magnetopause standoff distance Rmp(t) and the the upper auroral index AU from the eastward auroral electrojet current in the auroral oval. The dynamical frequencies are in the range to drive ULF and VLF waves in the magnetosphere. The addition of the Chapman-Ferraro currents to the WINDMI model allows the prediction of the sudden commencement peaks of positive Dst that occur when the magnetopuase is pushed Earthward by a strong pressure pulse. The first runs show a sudden commencement signal typical of the data. The work is supported by NSF grant ATM-0638480.