Substorm Electric Fields in the Earth's Magnetotail

  1. Edward W. Hones Jr.
  1. C. A. Cattell and
  2. F. S. Mozer

Published Online: 19 MAR 2013

DOI: 10.1029/GM030p0208

Magnetic Reconnection in Space and Laboratory Plasmas

Magnetic Reconnection in Space and Laboratory Plasmas

How to Cite

Cattell, C. A. and Mozer, F. S. (1984) Substorm Electric Fields in the Earth's Magnetotail, in Magnetic Reconnection in Space and Laboratory Plasmas (ed E. W. Hones), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM030p0208

Author Information

  1. Space Sciences Laboratory, University of California, Berkeley, California 94720

Publication History

  1. Published Online: 19 MAR 2013
  2. Published Print: 1 JAN 1984

ISBN Information

Print ISBN: 9780875900582

Online ISBN: 9781118664223

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Keywords:

  • Earth's magnetotail;
  • Electric field;
  • Magnetic field;
  • Near satellite reconnection;
  • Substorm electric fields

Summary

A survey has been made of all the electric field data from the University of California, Berkeley, double probe experiment on ISEE-1 (apogee ∼22 R E ) during 1980 when the satellite was in the magnetotail. This study was restricted to the 74 events where E×B flows could be calculated and were ≥100 km/s. Substorm times were determined by examining the Ae index for peaks ≥250 γ. In association with substorms, ∼70% of the flows were earthward, and ∼20% had a signature called “near satellite reconnection” (first described by Nishida et al, 1983) of tailward flow followed by earthward flow which can be interpreted in terms of a model where the x-line forms earth-ward of the satellite and subsequently propagates tailward past it. This type event occurred only tailward of X GSM = −21 R E and within | Y GSM | ≤ 4.5 R E . These data suggest that the near earth x-line usually forms tailward of X GSM ≈ − 20 R E .