TY JOUR TI Variations in cosmic ray cutoff rigidities during the March 8–11, 2012 magnetic storm (CAWSES II period) KW geomagnetic threshold KW cosmic rays KW supersubstorm KW interplanetary magnetic field KW geomagnetic activity JO Solar-Terrestrial Physics AU Danilova, O.A. AU Ptitsyna, N.G. AU Tyasto, M.I. AU Sdobnov, V.E. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.