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 16, issue 8
Ann. Geophys., 16, 914–920, 1998
https://doi.org/10.1007/s00585-998-0914-z
© European Geosciences Union 1998
Ann. Geophys., 16, 914–920, 1998
https://doi.org/10.1007/s00585-998-0914-z
© European Geosciences Union 1998

  31 Aug 1998

31 Aug 1998

Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source

A. S. Leonovich and V. A. Mazur A. S. Leonovich and V. A. Mazur
  • Institute of Solar-Terrestrial Physics (ISTP), Russian Academy of Science, Siberian Branch, Irkutsk 33 P.O.Box 4026, 664033 Russia e- mail: leon@iszf.irk.ru

Abstract. As a continuation of our earlier paper, we consider here the case of the excitation of standing Alfvén waves by a source of the type of sudden impulse. It is shown that, following excitation by such a source, a given magnetic shell will exhibit oscillations with a variable frequency which increases from the shell's poloidal to toroidal frequency. Simultaneously, the oscillations will also switch over from poloidally (radially) to toroidally (azimuthally) polarized. With a reasonably large attenuation, only the start of this process, the stage of poloidal oscillations, will be observed in the ionosphere.

Key words. Ionosphere-magnetosphere interactions · Wave propagation · MHD waves and instabilities

Publications Copernicus
Download
Citation