Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 1.490
IF1.490
IF 5-year value: 1.445
IF 5-year
1.445
CiteScore value: 2.9
CiteScore
2.9
SNIP value: 0.789
SNIP0.789
IPP value: 1.48
IPP1.48
SJR value: 0.74
SJR0.74
Scimago H <br class='widget-line-break'>index value: 88
Scimago H
index
88
h5-index value: 21
h5-index21
Volume 15, issue 12
Ann. Geophys., 15, 1537–1547, 1997
https://doi.org/10.1007/s00585-997-1537-5
© European Geosciences Union 1997
Ann. Geophys., 15, 1537–1547, 1997
https://doi.org/10.1007/s00585-997-1537-5
© European Geosciences Union 1997

  31 Dec 1997

31 Dec 1997

Afternoon mid-latitude current system and low-latitude geomagnetic field asymmetry during geomagnetic storms

A. Grafe2, P. A. Bespalov1, V. Y. Trakhtengerts1, and A. G. Demekhov1 A. Grafe et al.
  • 1Institute of Applied Physics, 46 Ulyanov St., 603600 Nizhny Novgorod, Russia
  • 2GeoForschungsZentrum, Telegrafenberg, D-14473 Potsdam, Germany

Abstract. For four geomagnetic storms of middle intensity the relationship between the low-latitude magnetic field asymmetry using ASY indices and the intensity of the auroral eastward and westward electrojet was considered. It was asked whether there exists a connection between ASY and the eastward electrojet. To answer this question equivalent current systems were estimated in mid-latitudes. It was found that the observations obviously show no correlative relationship between the low-latitude magnetic-field asymmetry and the eastward electrojet, whereas one exists between ASY and the westward electrojet. To explain the generally accepted common three-dimensional current system between the partial ring current and the eastward electrojet, a condensor model of the three-dimensional current system was developed. It could be shown that the short periodic variations of the partial ring current are shielded by the condensor and cannot influence the eastward-electrojet current.

Publications Copernicus
Download
Citation