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Ann. Geophys., 25, 1721-1725, 2007
www.ann-geophys.net/25/1721/2007/
© European Geosciences Union 2007
Anomalous behavior of cutoff rigidity variation in the region of the Mexico station during a magnetic superstorm on 20 November 2003
V. V. Pchelkin, E. V. Pchelkina, and I. V. Golovchanskaya
Polar Geophysical Institute RAS, Fersman Str. 14, Apatity, Murmansk region, 184200, Russia
Abstract. The pioneering storm-time model of magnetospheric magnetic field T01S made
possible trajectory calculations for the events of giant magnetic storms. We
have performed such calculations for a unique magnetic storm on 20 November
2003. In our previous paper, Belov et al. (2005), dedicated to the
magnetospheric effects of cosmic rays (CR) during this storm, we revealed an
anomalous behavior of a cutoff rigidity variation at the Mexico station. Here,
by trajectory calculations, we demonstrate that this peculiarity persists in
the latitudinal and longitudinal curves of cutoff rigidity (Rc) for both
quiet and storm-time conditions and thus should be considered as physically
meaningful.
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