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IJRSP Vol.38(5) [October 2009] >


Title: Variations of geomagnetic Dst, auroral indices and cosmic ray intensity during 28-31 Oct 2003 Halloween events
Authors: Kane, R P
Keywords: Geomagnetic index variations
Interplanetary storm
Halloween event
Auroral indices
Geomagnetic storm
Cosmic ray intensity
Issue Date: Oct-2009
Publisher: CSIR
PACS No.: 91.25.Rt; 96.50.sh; 94.30.Lr
Abstract:  During 28-31 Oct 2003, there was intense interplanetary storm activity (Halloween events). A major storm started at about 0400-0600 hrs UT on 29 Oct 2003, reflected in extreme values of interplanetary parameters and geomagnetic index Dst. While few hours preceding 0400 hrs UT, it was essentially quiet but the auroral indices AL, AU, AE were not quiet and showed moderate increases. Thus, at least for this gigantic super fast storm (velocity of the solar wind disturbance exceeding 2000 kms-1), auroral indices seemed to be precursors with an antecedence of a few hours. This needs to be checked for very strong storms in future, probably after 2010, when cycle 24 sunspot activity will be in full swing
Page(s): 245-253
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.38(5) [October 2009]

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