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

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 27, issue 12
Ann. Geophys., 27, 4521–4532, 2009
https://doi.org/10.5194/angeo-27-4521-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 27, 4521–4532, 2009
https://doi.org/10.5194/angeo-27-4521-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  11 Dec 2009

11 Dec 2009

Magnetopause surface oscillation frequencies at different solar wind conditions

F. Plaschke1, K.-H. Glassmeier1,2, D. G. Sibeck3, H. U. Auster1, O. D. Constantinescu1, V. Angelopoulos4, and W. Magnes5 F. Plaschke et al.
  • 1Institut für Geophysik und extraterrestrische Physik, TU Braunschweig, Braunschweig, Germany
  • 2Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany
  • 3NASA, Goddard Space Flight Center, Greenbelt, MD, USA
  • 4Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
  • 5Space Research Institute, Austrian Academy of Sciences, Graz, Austria

Abstract. Statistical analyses of the magnetopause (MP) motion observed by THEMIS suggested that the MP oscillates preferably at some prominent (sometimes called "magic") frequencies, which were found to stand out also in ground-based and ionospheric measurements of geomagnetic ultra-low frequency pulsations. In this paper we present an extension to these statistical analyses of the observed MP oscillations examining their dependence on the prevalent interplanetary magnetic field (IMF), solar wind (SW) flow speed and cone angle conditions as well as their local time of occurrence. Our results show enhanced oscillation activity at these frequencies in the noon local time sector during periods of northward IMF, slow or moderate SW speed and low SW cone angle. This combination of conditions supports an interpretation in terms of standing Alfvénic Kruskal-Schwarzschild surface modes on the MP.

Publications Copernicus
Download
Citation