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Studies of the substorm on March 12, 1991: 1. Structure of substorm activity and auroral ions

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Abstract

The substorm on March 12, 1991 is studied using the data of ground-based network of magnetometers, all-sky cameras and TV recordings of aurora, and measurements of particle fluxes and magnetic field onboard a satellite in the equatorial plane. The structure of substorm activity and the dynamics of auroral ions of the central plasma sheet (CPS) and energetic quasi-trapped ions related to the substorm are considered in the first part. It is shown that several sharp changes in the fluxes and pitch-angle distribution of the ions which form the substorm ion injection precede a dipolarization of the magnetic field and increases of energetic electrons, and coincide with the activation of aurora registered 20° eastward from the satellite. A conclusion is drawn about different mechanisms of the substorm acceleration (injection) of electrons and ions.

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Authors and Affiliations

  1. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    L. L. Lazutin

  2. Polar Geophysical Institute, Kola Scientific Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184200, Russia

    T. V. Kozelova & B. V. Kozelov

  3. Mullard Space Science Laboratory, University College London, British Antarctic Survey, Cambridge, Great Britain, UK

    N. P. Meredith

  4. Oulu University, Finland

    M. Danielides & J. Jussila

  5. Max Planck Institute, Lindau, Germany

    A. Korth

Authors
  1. L. L. Lazutin
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  2. T. V. Kozelova
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  3. N. P. Meredith
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  4. M. Danielides
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  5. B. V. Kozelov
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  6. J. Jussila
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  7. A. Korth
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Original Russian Text © L.L. Lazutin, T.V. Kozelova, N.P. Meredith, M. Danielides, B.V. Kozelov, J. Jussila, A. Korth, 2007, published in Kosmicheskie Issledovaniya, 2007, Vol. 45, No. 1, pp. 31–43.

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Lazutin, L.L., Kozelova, T.V., Meredith, N.P. et al. Studies of the substorm on March 12, 1991: 1. Structure of substorm activity and auroral ions. Cosmic Res 45, 27–38 (2007). https://doi.org/10.1134/S0010952507010042

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  • DOI: https://doi.org/10.1134/S0010952507010042

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