Abstract
Variations in the rigidity spectrum and anisotropy of cosmic rays (CRs) during the ground level enhancement (GLE) of CR intensity on October 28, 2003, are studied on the basis of ground and satellite observations by the worldwide network of CR stations using the spectrographic global survey approach developed at the Institute of Solar and Terrestrial Physics, Siberian Branch, Russian Academy of Sciences. Cosmic ray rigidity spectra are determined for different periods of the considered event. It is shown that acceleration of protons during this GLE was observed up to rigidities of ~10–14 GV, and neither a power law nor an exponential function of the rigidity of particles describes the CR differential rigidity spectra during the event. Analysis indicates that the Earth was in a loop-like structure of the interplanetary magnetic field at the time of the GLE event.
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ACKNOWLEDGMENTS
The results were obtained on the equipment at the Angara shared resource center (http://ckp-rf.ru/ckp/3056/) and the unique scientific facility of the Russian National Ground Network of Cosmic Ray Stations.
FUNDING
This work was supported by Fundamental Research Program II.16.
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Translated by O. Pismenov
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Kravtsova, M.V., Sdobnov, V.E. Ground Level Enhancement of Cosmic Rays on October 28, 2003: Spectra and Anisotropy. Bull. Russ. Acad. Sci. Phys. 83, 527–530 (2019). https://doi.org/10.3103/S1062873819050198
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DOI: https://doi.org/10.3103/S1062873819050198