Computer Science
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008adspr..42.1556t&link_type=abstract
Advances in Space Research, Volume 42, Issue 9, p. 1556-1563.
Computer Science
6
Scientific paper
We report on a study of cosmic ray cutoff rigidity variations during the strong geomagnetic storm of 18 24 November 2003. We employed the most recent Tsyganenko magnetospheric model to represent the very strong disturbed Magnetosphere. We used this magnetic field for the cosmic ray trajectory calculations to determine the geomagnetic cutoff rigidity throughout this period of severe geomagnetic disturbance. We determine the cutoff rigidity changes during this period by two methods, by trajectory calculations and by the spectrographic global survey method. The values of the change of cutoff rigidities obtained by two different methods are correlated with the Dst and interplanetary magnetic field and plasma parameters and result in correlation coefficients in the range 0.63 0.84 for the various cosmic ray stations. The result of this study indicates that the most significant contributions to the cutoff rigidity changes are due to Dst variation although the influence of solar wind density and Bz and By components of IMF variations is significant.
Danilova O. A.
Dorman Lev I.
Dvornikov V. M.
Sdobnov V. E.
Tyasto M. I.
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