TY JOUR TI Variations in cosmic ray cutoff rigidities during the greatgeomagnetic storm of November 2004 KW cosmic rays KW cutoff rigidity KW magnetic storms KW magnetospheric model JO Solnechno-Zemnaya Fizika AU Tyasto, M.I. AU Danilova, O.A. AU Ptitsyna, N.G. AU Sdobnov, V.E. PY 2015 IS 1 PB INFRA-M Academic Publishing LLC.