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| Titel |
Guided waves in the plasma sheet and triggering of a substorm |
| VerfasserIn |
V. V. Safargaleev, V. B. Lyatsky |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 10/11 ; Nr. 12, no. 10/11, S.1018-1021 |
| Datensatznummer |
250010339
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| Publikation (Nr.) |
 copernicus.org/angeo-12-1018-1994.pdf |
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| Zusammenfassung |
| A guided propagation of magnetoacoustic wave
in the plasma sheet located between two lobes of the magnetotail is
investigated. The dispersion equation for the wave and equation connecting a
disturbance of plasma pressure inside the plasma sheet and amplitude of the
plasma sheet boundary oscillations are obtained. For some value of plasma
pressure disturbance, the displacement of the plasma sheet boundaries becomes of
order of the half-thickness of the plasma sheet. In the case of symmetrical
oscillations of the boundaries ("sausage-like" mode), it creates the
favourable conditions for reconnection of the magnetic field lines in the
magnetotail and may lead to triggering of a substorm. The magnetoacoustic wave
may be generated by sudden impulse of the solar wind plasma pressure. |
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