Two kinds of magnetotail response to the enhanced energy loading compared

VA Sergeev, MV Kubyshkina, K Liou, G Parks, R Nakamura, T Mukai, JA Sauvaud

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

We show the isolated convection bay followed after a classic substorm to compare and contrast their signatures. Both events, caused by the southward IMF episodes, displayed the enhanced convection, comparable Dst decreases and auroral zone Pi2 pulsations. Unlike the substorm event, the signatures of energy loading/unloading and near-Earth reconnection (lobe field changes, poleward auroral expansion, SCW growth, strong injection to 6.6 Re) were virtually absent during the convection bay. We emphasize the auroral dynamics, which was basically organized by multiple auroral streamers which start sporadically at the poleward boundary of wide double oval, propagate equatorward (in 3-8 min) and end with a long-duration bright spot in the equatorward oval. Streamers are closely associated with the plasma sheet BBFs and short, narrow and soft injections to 6.6 Re. We argue that the 'pressure crisis' in the tail plasma sheet was significantly reduced during the convection bay and that Earthward transport by sporadic narrow (similar to3 Re wide) plasma jets (plasma bubbles) from distant reconnection regions to the inner magnetosphere was efficient enough to avoid the energy loading and resulting substorm instability in the tail.

Original languageEnglish
Title of host publicationPROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON SUBSTORMS
EditorsA Wilson
PublisherESA Publication Division
Pages75-78
Number of pages4
ISBN (Print)92-9092-772-0
StatePublished - 2000
Event5th International Conference on Substorms - ST PETERSBURG
Duration: 16 May 200020 May 2000

Publication series

NameESA SPECIAL PUBLICATIONS
PublisherESA PUBLICATIONS DIVISION C/O ESTEC
Volume443
ISSN (Print)0379-6566

Conference

Conference5th International Conference on Substorms
CityST PETERSBURG
Period16/05/0020/05/00

Keywords

  • MAGNETOSPHERIC CONVECTION
  • ASSOCIATION

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