Quasi‐periodic oscillations of the magnetopause during northward sheath magnetic field

S. Kokubun, Hideaki Kawano, M. Nakamura, T. Yamamoto, K. Tsuruda, H. Hayakawa, A. Matsuoka, L. A. Frank

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The Geotail satellite quasi‐periodically crossed the dawn flank of magnetopause more than ten times during an interval of 1.5 hours on November 4, 1992. Magnetopause crossings were characterized by quasi‐periodic pulses of a sawtooth wave form in the magnetic field and the plasma flow components tangential to the magnetopause. The magnetic field strength in the magnetosheath was larger than that in the magnetosphere. The direction of magnetic field outside the magnetopause current layer was northward with antisunward tilt, indicating the draping of magnetic field on the magnetopause. Boundary normals of wavy magnetopause systematically incline sunward on the upstream side, while they tend to incline antisunward with considerable deviation on the downstream side. Comparison with other multiple crossing events suggests that the November 4 event exhibits wavy structure of the dawn flank magnetopause associated with the northward interplanetary magnetic field.

Original languageEnglish
Pages (from-to)2883-2886
Number of pages4
JournalGeophysical Research Letters
Volume21
Issue number25
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

Fingerprint

magnetopause
sheaths
oscillation
magnetic field
oscillations
magnetic fields
magnetosheath
interplanetary magnetic fields
magnetohydrodynamic flow
tilt
magnetospheres
upstream
magnetosphere
field strength
intervals
deviation
plasma
pulses

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Kokubun, S., Kawano, H., Nakamura, M., Yamamoto, T., Tsuruda, K., Hayakawa, H., ... Frank, L. A. (1994). Quasi‐periodic oscillations of the magnetopause during northward sheath magnetic field. Geophysical Research Letters, 21(25), 2883-2886. https://doi.org/10.1029/94GL02103

Quasi‐periodic oscillations of the magnetopause during northward sheath magnetic field. / Kokubun, S.; Kawano, Hideaki; Nakamura, M.; Yamamoto, T.; Tsuruda, K.; Hayakawa, H.; Matsuoka, A.; Frank, L. A.

In: Geophysical Research Letters, Vol. 21, No. 25, 01.01.1994, p. 2883-2886.

Research output: Contribution to journalArticle

Kokubun, S, Kawano, H, Nakamura, M, Yamamoto, T, Tsuruda, K, Hayakawa, H, Matsuoka, A & Frank, LA 1994, 'Quasi‐periodic oscillations of the magnetopause during northward sheath magnetic field', Geophysical Research Letters, vol. 21, no. 25, pp. 2883-2886. https://doi.org/10.1029/94GL02103
Kokubun, S. ; Kawano, Hideaki ; Nakamura, M. ; Yamamoto, T. ; Tsuruda, K. ; Hayakawa, H. ; Matsuoka, A. ; Frank, L. A. / Quasi‐periodic oscillations of the magnetopause during northward sheath magnetic field. In: Geophysical Research Letters. 1994 ; Vol. 21, No. 25. pp. 2883-2886.
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