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 24, issue 7
Ann. Geophys., 24, 1957–1968, 2006
https://doi.org/10.5194/angeo-24-1957-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 24, 1957–1968, 2006
https://doi.org/10.5194/angeo-24-1957-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  09 Aug 2006

09 Aug 2006

Alternating bursts of low energy ions and electrons near the substorm onset

T. V. Kozelova1, L. L. Lazutin2, B. V. Kozelov1, N. Meredith3, and M. A. Danielides4 T. V. Kozelova et al.
  • 1Polar Geophysical Institute, Apatity, Murmansk region, 184209, Russia
  • 2Russia Space Science Division, Scobeltsyn Institute for Nuclear Physics of Moscow State University, Russia
  • 3Mullard Space Science Laboratory, University College, London, UK
  • 4Space Physics Group, University of Oulu, Finland

Abstract. The substorm associated behavior of the low energy particles (30 eV–28.5 keV) near the earthward edge of the plasma sheet is examined using data from CRRES during the late growth and early expansion phases of a substorm on 12 March 1991 and their significance for the substorm onset mechanism is discussed. In this substorm, the CRRES was located on L ~6.3 and ~20° westward of the substorm onset and observed the sequence of the alternating bursts of the low energy ions and electrons. The bursts of the 0.633–9.6 keV ions occurred 1–2 min before the (7.31–21.7 keV) electron bursts. The first ion burst happened 2min before the substorm onset, at the moment of weak brightening of the most equatorial pre-breakup arc near the latitude ~62°. The alternation of the ion and electron bursts may be a signature of a drift-Alfvén ballooning instability on the inner edge of the plasma sheet near substorm onset.

Publications Copernicus
Download
Citation