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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 12
Ann. Geophys., 16, 1589–1598, 1998
https://doi.org/10.1007/s00585-998-1589-1
© European Geosciences Union 1998
Ann. Geophys., 16, 1589–1598, 1998
https://doi.org/10.1007/s00585-998-1589-1
© European Geosciences Union 1998

  31 Dec 1998

31 Dec 1998

A new southern high-latitude index

P. Ballatore1, C. G. Maclennan2, M. J. Engebretson3, M. Candidi1, J. Bitterly4, C.-I. Meng5, and G. Burns6 P. Ballatore et al.
  • 1IFSI/CNR, c.p.27, 00044 Frascati, Rome, Italy
  • 2Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA
  • 3Dept. of Physics, Augsburg College, Minneapolis, MN 55454 USA
  • 4Ecole et Observatoire de Physique du Globe, Strasbourg, France
  • 5Johns Hopkins Applied Physics Laboratory, Laurel, MD 20723 USA
  • 6Australian Antarctic Division, Hobart, Australia

Abstract. We have developed and examined a new regional geomagnetic index AES-80, defined similarly to the classical auroral electrojet AE index, using data from five Antarctic stations located at corrected geomagnetic latitudes about 80 °S. Because only sparse ground-based information can be derived from auroral latitudes in the Southern Hemisphere, and because no index comparable to AE can be constructed from locations in the south, the possibility of using AES-80 as a measure of high latitudes and polar cap activity is investigated. As a global average activity level indicator, it is found that in general AES-80 gives results rather similar to the classical AE index. However AES-80 provides a more robust measure of the occurrence of high-latitude geomagnetic activity.

Key words. Magnetospheric physics (auroral phenomena; polar cap phenomena).

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