La enfermedad de Rasmussen es una enfermedad cerebral cróica, inflamatoria, que afecta a un solo hemisferio y se caracteriza or su curso progresivo con crisis convulsivas, resistentes al trataiento anticomicial1. Suetiología es incierta. Se relaciona con la infecciónpordistintos irus neurotropos, la existencia de anticuerpos contra el receptor del glutamato cerebral (anti-GluR3), anticuerpos an...

One of the most significant observations associated with a sharp enhancement in solar wind dynamic pressure, , is poleward expansion auroral oval and closing polar cap. The cap shrinking over wide range magnetic local times (MLTs), connection an observed increase ionospheric convection transpolar potential, led to conclusion that nightside reconnection rate significantly enhanced after pressure...

[1] We investigate the spatial structure of the electron diffuse aurora during the 19 October 1998 storm by comparing drift-loss simulations with precipitating particle data and auroral images. Distributions of precipitating diffuse aurora during magnetic storms depend on variation of the magnetotail electron distributions, electron transport, and electron pitch-angle scattering. In our simulat...

Recent work has shown that solar wind dynamic pressure changes can have a dramatic effect on the particle precipitation in the high-latitude ionosphere. It has also been noted that the preexisting interplanetary magnetic field (IMF) orientation can significantly affect the resulting changes in the size, location, and intensity of the auroral oval. Here we focus on the effect of pressure pulses ...

We examine the large-scale ultraviolet aurora and convection responses to a series of flux transfer events that immediately followed a sharp and isolated southward turning of the IMF. During the interval of interest, SuperDARN was monitoring the plasma convection in the dayside northern ionosphere, while the VIS Earth Camera and the Far Ultraviolet Imager (UVI) were monitoring the northern hemi...

[1] The two-dimensional structure of thermospheric neutral composition, specifically, the atomic oxygen to molecular nitrogen column density ratio, [O/N2], is studied during the 17–24 April 2002 geomagnetic storms to understand the cause of ionospheric storms in regions equatorward of the auroral oval on an instantaneous large scale. The [O/N2] ratio is derived from the dayglow emission ratio o...

Results concerning the electrodynamics of the nightside auroral bulge are presented based on simultanous satellite and ground-based observations. The satellite data include Astrid-2 measurements of electric fields, currents and particles from a midnight auroral oval crossing and Polar UVI images of the large-scale auroral distribution. The ground-based observations include STARE and SuperDARN e...

In this work, the Polar UVI data set by Kullen et al. (2002) of 74 polar arcs is reinvestigated, focusing on bending arcs. Bending arcs are typically faint and form (depending on interplanetary magnetic field (IMF) By direction) on the dawnside or duskside oval with the tip of the arc splitting off the dayside oval. The tip subsequently moves into the polar cap in the antisunward direction, whi...