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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 8
Ann. Geophys., 16, 891–899, 1998
© European Geosciences Union 1998
Ann. Geophys., 16, 891–899, 1998
© European Geosciences Union 1998

  31 Aug 1998

31 Aug 1998

Mapping travelling convection vortex events with respect to energetic particle boundaries

T. Moretto1 and A. Yahnin2 T. Moretto and A. Yahnin
  • 1Danish Meteorological Institute, Solar-Terrestrial Physics Division, DK-2100 Copenhagen, Denmark (E-mail:
  • 2Polar Geophysical Institute, Apatity, Murmansk region,184200 Russia (E-mail:

Abstract. Thirteen events of high-latitude ionospheric travelling convection vortices during very quiet conditions were identified in the Greenland magnetometer data during 1990 and 1991. The latitudes of the vortex centres for these events are compared to the energetic electron trapping boundaries as identified by the particle measurements of the NOAA 10 satellite. In addition, for all events at least one close DMSP overpass was available. All but one of the 13 cases agree to an exceptional degree that: the TCV centres are located within the region of trapped, high energy electrons close to the trapping boundary for the population of electrons with energy greater than >100 keV. Correspondingly, from the DMSP data they are located within the region of plasmasheet-type precipitation close to the CPS/BPS precipitation boundary. That is, the TCV centres map to deep inside the magnetosphere and not to the magnetopause.

Key Words. Ionosphere (Electric fields and currents; Particle precipitation) · Magnetospheric physics (Magnetosphere-ionosphere interaction)

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