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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 22, issue 6
Ann. Geophys., 22, 2255–2271, 2004
https://doi.org/10.5194/angeo-22-2255-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 22, 2255–2271, 2004
https://doi.org/10.5194/angeo-22-2255-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.

  14 Jun 2004

14 Jun 2004

Statistical analysis of solar proton events

V. Kurt1, A. Belov2, H. Mavromichalaki3, and M. Gerontidou3 V. Kurt et al.
  • 1Institute of Nuclear Physics, Moscow State University, 119899 Vorobievy Gory, Moscow, Russia
  • 2Inst. of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Science (IZMIRAN), Russia
  • 3Nuclear and Particle Physics Section, Physics Department University of Athens, 15771 Athens, Greece

Abstract. A new catalogue of 253 solar proton events (SPEs) with energy >10MeV and peak intensity >10 protons/cm2.s.sr (pfu) at the Earth's orbit for three complete 11-year solar cycles (1970-2002) is given. A statistical analysis of this data set of SPEs and their associated flares that occurred during this time period is presented. It is outlined that 231 of these proton events are flare related and only 22 of them are not associated with Ha flares. It is also noteworthy that 42 of these events are registered as Ground Level Enhancements (GLEs) in neutron monitors. The longitudinal distribution of the associated flares shows that a great number of these events are connected with west flares. This analysis enables one to understand the long-term dependence of the SPEs and the related flare characteristics on the solar cycle which are useful for space weather prediction.

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