Plasma flows and magnetic field vectors in the plasma sheet during substorms

Download
  1. Get@NRC: Plasma flows and magnetic field vectors in the plasma sheet during substorms (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1029/JA083iA08p03849
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Geophysical Research: Space Physics
ISSN2169-9380
Volume83
IssueA8
Pages38493858
AbstractSimultaneous observations of plasma flow and the magnetic field in the plasma sheet from the Imp 6 satellite during magnetospheric substorms are examined to assess whether plasma flow is predominantly perpendicular or along the magnetic field line. For the period from September 1971 to December 1972, simultaneous magnetic field data are available for a total of 119 measurements of plasma flow during plasma sheet thinnings and expansions within the downstream distance of XSM ≃ -32 RE. It is found that the observed plasma flow has a large component along the magnetic field line and is not simply the equation image drift (steady or transient convection flow) nor any cross-field flow. In general, the higher the flow speed, the closer the observed plasma flow direction is aligned with the magnetic field line. Further, there is no clear association between the plasma flow direction and the sign of the BZSM component of the magnetic field. These results suggest that in general the rapid plasma flows observed in the magnetotail during substorms are predominantly field-aligned flows and are likely to be due to a magnetic-field-aligned pressure gradient or magnetic-field-aligned electric field.
Publication date
LanguageEnglish
Peer reviewedYes
NRC number16788
NPARC number21274455
Export citationExport as RIS
Report a correctionReport a correction
Record identifier7abb7cbe-2988-4d11-a1d1-5c257504f1c2
Record created2015-03-16
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)