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

Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year
    1.614
  • CiteScore value: 1.61 CiteScore
    1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 80 Scimago H
    index 80
Volume 27, issue 6
Ann. Geophys., 27, 2457-2474, 2009
https://doi.org/10.5194/angeo-27-2457-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 27, 2457-2474, 2009
https://doi.org/10.5194/angeo-27-2457-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  19 Jun 2009

19 Jun 2009

Solar wind and substorm excitation of the wavy current sheet

C. Forsyth1,2, M. Lester1, R. C. Fear1, E. Lucek3, I. Dandouras4, A. N. Fazakerley2, H. Singer5, and T. K. Yeoman1 C. Forsyth et al.
  • 1Dept. Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK
  • 2Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK
  • 3Blackett Laboratory, Imperial College, London, SW7 2BZ, UK
  • 4CESR/CNRS-Université de Toulouse, 9 Avenue du Colonel Roche, B.P. 4346, 31028, Toulouse Cedex 4, France
  • 5National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA

Abstract. Following a solar wind pressure pulse on 3 August 2001, GOES 8, GOES 10, Cluster and Polar observed dipolarizations of the magnetic field, accompanied by an eastward expansion of the aurora observed by IMAGE, indicating the occurrence of two substorms. Prior to the first substorm, the motion of the plasma sheet with respect to Cluster was in the ZGSM direction. Observations following the substorms show the occurrence of current sheet waves moving predominantly in the −YGSM direction. Following the second substorm, the current sheet waves caused multiple current sheet crossings of the Cluster spacecraft, previously studied by Zhang et al. (2002). We further this study to show that the velocity of the current sheet waves was similar to the expansion velocity of the substorm aurora and the expansion of the dipolarization regions in the magnetotail. Furthermore, we compare these results with the current sheet wave models of Golovchanskaya and Maltsev (2005) and Erkaev et al. (2008). We find that the Erkaev et al. (2008) model gives the best fit to the observations.

Publications Copernicus
Download
Citation
Share