Response of the magnetospheric convection to sudden interplanetary magnetic field changes as deduced from the evolution of partial ring currents

We examined the response of the partial ring current (PRC) to sudden changes in the interplanetary magnetic field (IMF) Bz for two PRC events, in order to investigate the response of the convection in the near‐Earth magnetotail to IMF changes. We found that ground magnetic changes due to the PRC sta...

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Bibliographic Details
Published in:Journal of Geophysical Research. A. Space Physics 2002-11, Vol.107 (A11), p.SMP 1-1-SMP 1-14
Main Authors: Hashimoto, Kumiko K., Kikuchi, Takashi, Ebihara, Yusuke
Format: Article
Language:English
Subjects:
DP2 magnetic perturbation
Earth, ocean, space
Exact sciences and technology
External geophysics
Interaction between ionosphere and magnetosphere
Interaction between magnetosphere and interplanetary space
ionospheric convection
magnetic field at low latitude
magnetospheric convection
partial ring current
Physics of the ionosphere
Physics of the magnetosphere
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Summary:We examined the response of the partial ring current (PRC) to sudden changes in the interplanetary magnetic field (IMF) Bz for two PRC events, in order to investigate the response of the convection in the near‐Earth magnetotail to IMF changes. We found that ground magnetic changes due to the PRC started to develop simultaneously at all local times with a time lag of 5–11 min from the growth of the ionospheric convection as detected by the polar cap magnetometers. The ground magnetometers furthermore showed that the asymmetric ring current changed into a symmetric ring current with no significant time lag (
ISSN:0148-0227
2156-2202
DOI:10.1029/2001JA009228