Observations of the Magnetosheath near the Nominal Tail Axis during the Geomagnetic Storm of January 25, 1993.

DOI Web Site 1 Citations 22 References
  • Nakamura R.
    Solar- Terrestrial Environment Laboratory, Nagoya University
  • Kokubun S.
    Solar- Terrestrial Environment Laboratory, Nagoya University
  • Kamide Y.
    Solar- Terrestrial Environment Laboratory, Nagoya University
  • Yamamoto T.
    Institute of Space and Astronautical Science
  • Frank L. A.
    Department of Physics and Astronomy, The University of Iowa
  • Paterson W. R.
    Department of Physics and Astronomy, The University of Iowa
  • Friis-Christensen E.
    Danish Meteorological Institute
  • Hayashi K.
    Department of Earth and Planetary Physics, Univ. Tokyo
  • Iyemori T.
    Data Analysis Center for Geomagnetism and Space Magnetism, Kyoto Univ.
  • Yumoto K.
    Department of Physics, Kyushu Univ.
  • Lühr H.
    Institut für Geophysik und Meteorologie, Technische Universität Braunschweig
  • Troshichev O. A.
    Geophysical Department, Arctic and Antarctic Institute

Bibliographic Information

Other Title
  • Observations of the Magnetosheath near

Search this article

Abstract

This paper reports plasma and field changes associated with magnetosheath encounters by GEOTAIL near the center of the tail axis at a down tail distance of X = -94 RE during the main phase of a weak geomagnetic storm on January 25, 1993. The magnetosheath entries of the satellite occurred in conjunction with an enhancement in the total pressure, having a temporal scale between 2 and 18 minutes. It is suggested that temporal and/or local structures in the solar wind such as pressure pulses caused these brief encounters. Assuming the flow direction in the magnetosheath to be parallel to the magnetotail boundary, we estimate the tail magnetic flux and the dimension of the tail for the encounter events. It is shown that solar wind variations, which generate geomagnetic storms, alter significantly the orientation as well as the size of the distant tail, such that the magnetosheath can be observed even near the center of the “average” tail.

Journal

Citations (1)*help

See more

References(22)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top