Physics of auroral phenomena : proceedings of the 36th Annual seminar, Apatity, 26 February – 01 March, 2013 / [ed. board: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2013. - 215 с. : ил., табл.

Yu. V. Balabin el al. Energy, GeV Energy, GeV Fig. 2 The spectra of prompt (a) and delayed (b) components. For readability the spectra are normalized to highlight their important characteristic - the slope. The PC spectra of the GLE05, GLE42, GLE69 events are outstanding in their hardness. DC spectra for these events are not different from the others. Conclusions Available in three out of for dozens of GLE events with two components argues that the presence of the PC in the growth phase and the DC after the maximum is typical. However, the exponential spectrum can only be produced by acceleration of charged particles in electric fields. With high certainty it can be argued that during flares in the active regions on the Sun electric fields are present and we see their results as PC. Explanation of the large GLE events was given. According measurements in the stratosphere and on spacecrafts, these events are not outstanding. Large increases are explained by specific NM sensitivity: NM response on the flux with the exponential spectrum is much more than a flux with a power spectrum. A c kn ow ledgm en ts. This work was supported by the RFBR grant 12-02-01305-a. References 1. M.A. Shea, D.F. Smart, Space Sci. Rev. 32 (1982) 251-255. 2. H. Debrunner, E. Flueckiger, J.A. Lockwood, 8th European Cosmic Ray Symposium Book of Abstracts (1984). 3. L.I. Miroshnichenko et. al:, Journal of Geophysical Research 110 (2005) a09s08 doi: 10.1029/2004ja010936. 4. J. Perez-Peraza, E.V. Vashenyuk, L.I. Miroshnichenko, Yu.V. Balabin, A. Gallegos-Cruz, The Astrophysical Journal 695 (2009) 865873. 5. E.V. Vashenyuk, Yu.V. Balabin, B.B. Gvozdevsky, L.I. Shchur, Geomagnetism and Aeronomy 48 (2008) 149153. 6. J.A. Perez-Peraza, E.V. Vashenyuk, A. Gallegos-Cruz, Y.V. Balabin, L.I. Miroshnichenko, Advances in Space Research 41 (2008)947954. 7. Yu.V. Balabin, E.V. Vashenyuk, O.V. Mingalev, A.I. Podgomy, I.M. Podgomy, Astronomy Reports 49 (2005) 837846. 8. I.M. Podgomy, Yu.V. Balabin, E.V. Vashenyuk, A.I. Podgomy, Bulletin of the Russian Academy of Sciences. Physics 75 (2011) 738-740. 9. E.V. Vashenyuk, L.I. Miroshnichenko,. Perez-Peraza, Yu.V. Balabin, B.B. Gvozdevsky, A. Gallegos-Cruz, Proc. of 30 ICRC (2007). 109