GLE events in 24th solar cycleстатья

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1. Полный текст e3sconf_strpep2018_01006.pdf 2,0 МБ 19 марта 2020 [germanenko]

[1] Gle events in 24th solar cycle / Y. Balabin, B. Gvozdevsky, A. Germanenko, E. Maurchev // E3S Web of Conferences. — 2018. — Vol. 62. — P. 01006. Started in 2009, the 24th solar cycle is going to end. In 2015, the solar activity was at its maximum, turning down. According to many indices, this cycle turned out to be abnormal. For instance, in the previous, the 23rd cycle, the index such as the number of solar spots was as high as 175, compared with that of the 24th cycle, not exceeding 100. According to the number of GLE-events (ground level enhancement of solar cosmic rays, observed on neutron monitors), the current cycle also differs greatly from the previous ones. In the 23rd cycle, the number of great GLE-events was as high as four, and that of small and moderate being five. In the 24th cycle, only two GLE-events were recorded: GLE 71 (17.05.2012) Ee Cyrillic sign GLE 72 (10.09.2017), with the last event being of small amplitude (5%). The presence of the neutron monitors network data enables calculation of the energy spectrum and other parameters of solar cosmic rays. The GLEevents are processed by special technique developed at PGI. It is aimed at solving the inverse problem: based on the data from the world neutron monitors network, to obtain the parameters of solar cosmic rays energy spectra. Like the previous ones, GLE-events 71 and 72 were processed by this technique. The energetic spectra obtained were compared with those in other events of the previous cycles © 2018 The Authors, published by EDP Sciences. [ DOI ]

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