Please use this identifier to cite or link to this item:
Title: Compression of the Earth's magnetotail by interplanetary shocks directly drives transient magnetic flux closure
Authors: Hubert, B.
Palmroth, M.
Laitinen, T. V.
Janhunen, P.
Milan, Steve E.
Grocott, Adrian
Cowley, S. W. H.
Pulkkinen, T. I.
Gérard, J.-C.
First Published: 2006
Publisher: American Geophysical Union (AGU)
Citation: Geophysical Research Letters, 2006, 33, L10105.
Abstract: We use a novel method to evaluate the global opening and closure of magnetic flux in the terrestrial system, and to analyse two interplanetary shock passages that occurred during magnetically quiet periods. We find that, even under these quiet conditions, where the amount of open flux was already low, the compression of the magnetotail by the shocks still created intense but short-lived bursts of flux closure reaching ∼130 kV, comparable to values obtained shortly after a substorm onset, although no expansion phase developed. The results, supported by a global MHD simulation of the space environment, point to a trigger mechanism of flux closure directly driven by the solar wind compression, independent of the usual substorm expansion phase process.
DOI Link: 10.1029/2006GL026008
ISSN: 0094-8276
Type: Article
Rights: This paper was published as Geophysical Research Letters, 2006, 33, L10105. It is also available from Doi: 10.1029/2006GL026008
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
Hubert2006b.pdf540.06 kBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.