TY - JOUR A1 - Pchelkin, V. V. A1 - Pchelkina, E. V. A1 - Golovchanskaya, I. V. T1 - Anomalous behavior of cutoff rigidity variation in the region of the Mexico station during a magnetic superstorm on 20 November 2003 JO - Ann. Geophys. J1 - ANGEO VL - 25 IS - 8 SP - 1721 EP - 1725 Y1 - 2007/08/29 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/25/1721/2007/ L1 - https://angeo.copernicus.org/articles/25/1721/2007/angeo-25-1721-2007.pdf DO - 10.5194/angeo-25-1721-2007 ER -