University of Oulu

Koldobskiy, S., & Mishev, A. (2022). Fluences of solar energetic particles for last three GLE events: Comparison of different reconstruction methods. Advances in Space Research, S0273117721008814.

Fluences of solar energetic particles for last three GLE events : comparison of different reconstruction methods

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Author: Koldobskiy, Sergey1,2,3; Mishev, Alexander1,2
Organizations: 1Sodankylä Geophysical Observatory, University of Oulu, Oulu, Finland
2Space Physics and Astronomy Research Unit, University of Oulu, Oulu, Finland
3National Research Nuclear University MEPhI, Moscow, Russia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
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Language: English
Published: Elsevier, 2022
Publish Date: 2022-09-06


Fluxes of solar energetic particles (SEPs), produced and accelerated in and in the vicinity of the Sun, are an important part of cosmic ray induced terrestrial effects such as ionizing radiation on the Earth’s orbit, which affects the exposure to radiation in space as well as the atmospheric ionization. Calculation of these effects requires the knowledge of the integral fluences of SEPs. High-energy solar particles are subject of special interest since they can significantly contribute to the total radiation dose and/or ionization. The main instrument to study the high-energy SEP events is a network of ground-based neutron monitors (NMs), used over the years to register a specific class of SEP, which is called ground-level enhancement (GLE) events. Up today, we possess records from 72 GLE events. Reconstruction of SEP integral and differential fluxes for GLE events using NM data is not an easy task, requires a careful and precise calculation of particle transport in the magnetosphere, atmosphere, and detector itself. In this work, we compare two methods of fluence reconstruction, “fast” and “full”, for the last three registered GLE events and additionally verify one of them using PAMELA experimental data.

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Series: Advances in space research
ISSN: 0273-1177
ISSN-E: 1879-1948
ISSN-L: 0273-1177
Volume: in press
Issue: in press
DOI: 10.1016/j.asr.2021.11.032
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: This work was supported by the Academy of Finland (projects 330064 QUASARE, 321882 ESPERA) and by the Russian Science Foundation project No. 20-72-10170 (in part of the fast method of SEP fluence reconstruction). The work was motivated and benefited from discussions in the framework of the International Space Science Institute International Team 441: High EneRgy sOlar partICle Events Analysis (HEROIC).
Academy of Finland Grant Number: 330064
Detailed Information: 330064 (Academy of Finland Funding decision)
321882 (Academy of Finland Funding decision)
Copyright information: © 2022 COSPAR. This is an open access article under the CC BY license (