The auroral break-up as related to the interplanetary parameters and the geomagnetic activity

In the present study, we used as a significant indicator of the auroral break-up the "sudden equatorward shift" in arcs or displays. For the dark months of May and June of 1971, auroral observations at Base General Belgrano (78,0° S; 38,8° W) were used. Four-hourly sequences centered at th...

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Detalles Bibliográficos
Autor principal: Silbergleit, V. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1994
Materias:
Geofísica
ruptura de aurora
auroral break-up
actividad geomagnética
geomagnetic activity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134979
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134979
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
ruptura de aurora
auroral break-up
actividad geomagnética
geomagnetic activity
spellingShingle Geofísica
ruptura de aurora
auroral break-up
actividad geomagnética
geomagnetic activity
Silbergleit, V. M.
The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
topic_facet Geofísica
ruptura de aurora
auroral break-up
actividad geomagnética
geomagnetic activity
description In the present study, we used as a significant indicator of the auroral break-up the "sudden equatorward shift" in arcs or displays. For the dark months of May and June of 1971, auroral observations at Base General Belgrano (78,0° S; 38,8° W) were used. Four-hourly sequences centered at the break-up (t=0) were studied for the following quantities: a) The magnitude of the interplanetary magnetic field (B), b) The southward component of the interplanetary magnetic field (Bz), c) The solar wind speed (V), d) The solar wind electric field (the westward component: E ), e) The auroral electrojet magnetic activity indices (AE, AL, AU). On the basis of the seven substorms studied, one may deduce that an appreciable increase of geomagnetic activity occured about 40 minutes after the energy arrival at the magnetosphere, but it is not enough strong to take place the break-up, it will happen after another period of 35 minutes. This result confirms that a substorm only occurs after a build-up process. The present paper also confirms the possibility of using the auroral zone geomagnetic activity for estimating the solar wind velocity.
format Articulo
Articulo
author Silbergleit, V. M.
author_facet Silbergleit, V. M.
author_sort Silbergleit, V. M.
title The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
title_short The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
title_full The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
title_fullStr The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
title_full_unstemmed The auroral break-up as related to the interplanetary parameters and the geomagnetic activity
title_sort auroral break-up as related to the interplanetary parameters and the geomagnetic activity
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/134979
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