Abstract The results of investigation of the geomagnetic and auroral response to the commencement of a severe magnetic storm of November 20, 2003, are presented. It is established that the onset of SC led to the brightening of the auroral arc in the dusk sector for 2–3 min with its extent to the east with a velocity of 10–20 km/s and to displacement poleward with a velocity of ∼1.0 km/s. Furtheron, the fast auroral expansions of short duration (∼5 min) to the pole up to ∼2–4°were observed, repeating every 5–10 min during ∼40 min, which led to the spatial modulation of the brightness of the glow and to generation of PSC pulsations with similar periods of oscillations. The broadening of aurora poleward had a steplike character, with generation of new arcs poleward of previous ones ∼5 arcs per ∼1.5 min. The modulation of brightness of the glow and PSC were observed against the background of intensification of a two-cell DP2 type current system and were accompanied by multiple turnings of the IMF Bz from south to north and back. It is assumed that the source of PSC pulsations was a modulation of the intensity of the DP2 ionosphere currents as a result of variations of the magnetosphere convection level.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Manifestations of sudden commencement of a severe magnetic storm of November 20, 2003, in generation of an SC pulse, PSC pulsations, and spatial modulation of the auroral brightness


    Beteiligte:
    Baishev, D. G. (Autor:in) / Borisov, G. V. (Autor:in) / Velichko, V. A. (Autor:in) / Solovyev, S. I. (Autor:in) / Yumoto, K. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2004




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    55.60 Raumfahrttechnik / 39.00 Astronomie: Allgemeines / 50.93 Weltraumforschung
    Lokalklassifikation TIB:    770/3520/8000