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

Lazutin, L.L.; Kozelova, T.V.; Meredith, N.P. ORCID: https://orcid.org/0000-0001-5032-3463; Danielides, M.; Kozelov, B.V.; Jussila, J.; Korth, A.. 2007 Studies of the substorm on March 12, 1991: 1. Structure of substorm activity and auroral ions. Cosmic Research, 45 (1). 27-38. https://doi.org/10.1134/S0010952507010042

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Abstract/Summary

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 degrees eastward from the satellite. A conclusion is drawn about different mechanisms of the substorm acceleration (injection) of electrons and ions.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1134/S0010952507010042
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections
ISSN:	0010-9525
NORA Subject Terms:	Physics Space Sciences
Date made live:	06 Feb 2009 10:40 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/5947

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