Magnetospheric Dynamo Processes

  1. Thomas A. Potemra
  1. David P. Stern

Published Online: 21 MAR 2013

DOI: 10.1029/GM028p0200

Magnetospheric Currents

Magnetospheric Currents

How to Cite

Stern, D. P. (1984) Magnetospheric Dynamo Processes, in Magnetospheric Currents (ed T. A. Potemra), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM028p0200

Author Information

  1. Planetary Magnetospheres Branch, Goddard Space Flight Center, Greenbelt, MD 20771

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1984

ISBN Information

Print ISBN: 9780875900551

Online ISBN: 9781118664131



  • Magnetospheric currents—Congresses;
  • Plasma instabilities—Congresses


Three processes are examined whereby an effective electromotive force and energy input arise in circuits of magnetospheric currents, even in the absence of time-varying maagnetic fields. The first involves currents on “open” field lines, linking the ionosphere with the solar wind, and it underscores the role of polarization currents. The second may exist on the current filament observed in the vicinity of Jupiter's satellite Io. The third may operate along the high-latitude boundary of the earth's magnetic tail, from where it pumps energy into the plasma sheet.