HR: 1340h
AN: SM33B-1336    [Abstracts]
TI: A study on the ring current asymmetry during super-intense magnetic storms
AU: * Echer, E
EM: eecher@dge.inpe.br
AF: Instituto Nacional de Pesquisa Espaciais, Avenida Astronautas 1758, Sao Jose Campos, SP 12227010, Brazil
AU: Gonzalez, W
EM: gonzalez@dge.inpe.br
AF: Instituto Nacional de Pesquisa Espaciais, Avenida Astronautas 1758, Sao Jose Campos, SP 12227010, Brazil
AB: We have investigated the ring current asymmetry during super-intense magnetic storms (peak Dst ¡Ü-250 nT). In order to conduct this study, we have used high-resolution low-latitude ground-based magnetometer data. After removing the Sq variation, the disturbance in the H component (dH) was determined for each observatory and each superstorm. For each superstorm, we determined the peak dH and local time of occurrence for each observatory. With this information, we obtained a distribuiton of local-time X dH for all the superstorms studied. We have observed that most of the superstorms have the peak in dH observed at the dusk sector, but for a few of them the peak occurs near mid-night sector. These results are compared with previous works concerning storms of different intensity levels.
DE: 2740 Magnetospheric configuration and dynamics
DE: 2778 Ring current
DE: 2784 Solar wind/magnetosphere interactions
DE: 2788 Magnetic storms and substorms (7954)
DE: 7954 Magnetic storms (2788)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting