3:00 PM - 3:15 PM
[PEM28-07] Substorm Pi2 pulsations: Polarization patterns caused by azimuthal propagation of ionospheric loop currents
Keywords:Pi2 pulsation, Loop currents in auroral zone
We show that the polarization map of Samson and Harrold (1983) at first seem impossible will explain the Pi2 pulsations in simple way. These ground polarization patterns convey much information on the energy source of Pi2 pulsations and mode of oscillations in the magnetosphere.
Samson, J.C., and B. G. Harrold (1983), Maps of the polarizations of high latitude Pi2s, J.Geophys.Res., 88, 5736-5744.