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| Titel |
Solar wind and substorm excitation of the wavy current sheet |
| VerfasserIn |
Colin Forsyth, Mark Lester, Robert Fear, Elizabeth Lucek, Iannis Dandouras, Andrew Fazakerley, Harold Singer, Tim Yeoman |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250056646
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| Zusammenfassung |
| Following a solar wind pressure pulse on 3 August 2001, GOES 8, GOES 10, Cluster and
Polar observed dipolarizations of the magnetic field, accompanied by an eastward expansion
of the aurora observed by IMAGE, indicating the occurrence of two substorms. Prior to the
first substorm, the motion of the plasma sheet with respect to Cluster was in the ZGSM
direction. Observations following the substorms show the occurrence of current
sheet waves moving predominantly in the -Y GSM direction. Following the second
substorm, the current sheet waves caused multiple current sheet crossings of the
Cluster spacecraft, previously studied by Zhang et al. (2002). We further this study
to show that the velocity of the current sheet waves was similar to the expansion
velocity of the substorm aurora and the expansion of the dipolarization regions
in the magnetotail. Furthermore, we compare these results with the current sheet
wave models of Golovchanskaya and Maltsev (2005) and Erkaev et al. (2008).
We find that the Erkaev et al. (2008) model gives the best fit to the observations. |
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