Magnetic Islands in the Near Geomagnetic Tail and Its Implications for the Mechanism of 1054 UT CDAW 6 Substorm

  1. C. T. Russell,
  2. E. R. Priest and
  3. L. C. Lee
  1. N. Lin1,
  2. R. J. Walker1,
  3. R. L. Mcpherron2 and
  4. M. G. Kivelson2

Published Online: 21 MAR 2013

DOI: 10.1029/GM058p0647

Physics of Magnetic Flux Ropes

Physics of Magnetic Flux Ropes

How to Cite

Lin, N., Walker, R. J., Mcpherron, R. L. and Kivelson, M. G. (1990) Magnetic Islands in the Near Geomagnetic Tail and Its Implications for the Mechanism of 1054 UT CDAW 6 Substorm, in Physics of Magnetic Flux Ropes (eds C. T. Russell, E. R. Priest and L. C. Lee), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM058p0647

Author Information

  1. 1

    Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90024

  2. 2

    Institute of Geophysics and Planetary Physics and Department of Earth and Space Sciences, University of California, Los Angeles, CA 90024

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780875900261

Online ISBN: 9781118663868

SEARCH

Keywords:

  • Solar photosphere;
  • Magnetic flux;
  • Astrophysics

Summary

During the 1054 UT CDAW 6 substorm event two ISEE spacecraft observed dynamic changes in the magnetic field and in the flux of energetic particles in the near Earth (∼ 15 RE ) plasma sheet. In the substorm growth phase, the magnetic field at both ISEE spacecraft became tail-like. Following expansion phase onset, two small scale magnetic islands were observed moving tailward at a velocity of ∼ 580 km/s. The passage of these two magnetic islands was coincident with bursts of tailward streaming energetic particles. The length of the magnetic loops was estimated to have been ∼ 2 to 3 RE while the height of the loops was less than 0.5 RE . We suggest that the magnetic islands were produced by multi-point reconnection processes in the near tail plasma sheet which may have been associated with the formation of the near Earth neutral line and the subsequent formation of a large scale plasmoid. The near Earth neutral line retreated tailward later in the expansion phase as suggested by the reversal of the streaming of energetic particles.