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High Latitude Magnetospheric Topology and Magnetospheric Substorm : Volume 27, Issue 10 (28/10/2009)

By Antonova, E. E.

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Book Id: WPLBN0003978977
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: High Latitude Magnetospheric Topology and Magnetospheric Substorm : Volume 27, Issue 10 (28/10/2009)  
Author: Antonova, E. E.
Volume: Vol. 27, Issue 10
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany


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Orlova, K. G., Ovchinnikov, I. L., Kirpichev, I. P., Antonova, E. E., & Stepanova, M. V. (2009). High Latitude Magnetospheric Topology and Magnetospheric Substorm : Volume 27, Issue 10 (28/10/2009). Retrieved from

Description: Skobeltsyn Institute of Nuclear Physics Moscow State University, Moscow, Russia. This study is focused on the problem of the localization of substorm expansion onset. In this context, the high latitude topology of transverse magnetospheric currents has been analyzed. This study has included the radial distribution of plasma pressure near noon, obtained using the THEMIS-B satellite data, the daytime compression of magnetic field lines and the existence of magnetic field minima far from the equatorial plane, given by all geomagnetic field models. As a result, the dayside integral transverse currents at the geocentric distances 7–10 RE has been estimated. It is suggested, that nightside transverse currents at geocentric distances ~7–10 RE are closed inside the magnetosphere and with dayside transverse currents form surrounding the Earth current system (cut ring current or CRC) which topologically is the high latitude continuation of ordinary ring current. A possibility of localization of substorm expansion onset at the nighside CRC region is analyzed using the experimental evidences that the onset is localized at geocentric distances <10 RE.

High latitude magnetospheric topology and magnetospheric substorm

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