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Reconstruction of the fluence of extreme solar particle events registered in cosmogenic proxies

Koldobskiy, Sergey ; Mekhaldi, Florian LU ; Kovaltsov, Gennady and Usoskin, Ilya (2024) 38th International Cosmic Ray Conference, ICRC 2023 444.
Abstract

Extreme solar particle events (ESPEs) are infrequent yet highly potent manifestations of solar activity. These events result in the production of significant amounts of cosmogenic isotopes (CIs): 10Be, 36Cl, and 14C, which are subsequently deposited in natural stratified archives. Analyzing CI measurements from these archives allows us to assess the particle fluxes during ESPEs. In this study, we introduce a novel approach to reconstruct ESPE fluence (integral flux) by using recent modelling advancements. This method enables the integration of diverse CI data within a single comprehensive model. Within the new approach, ESPE fluence is represented as an ensemble of scaled fluence reconstructions for... (More)

Extreme solar particle events (ESPEs) are infrequent yet highly potent manifestations of solar activity. These events result in the production of significant amounts of cosmogenic isotopes (CIs): 10Be, 36Cl, and 14C, which are subsequently deposited in natural stratified archives. Analyzing CI measurements from these archives allows us to assess the particle fluxes during ESPEs. In this study, we introduce a novel approach to reconstruct ESPE fluence (integral flux) by using recent modelling advancements. This method enables the integration of diverse CI data within a single comprehensive model. Within the new approach, ESPE fluence is represented as an ensemble of scaled fluence reconstructions for ground-level enhancement (GLE) events, detected by the neutron monitor network since 1956 and coupled with satellite and ionospheric measurements. The reconstructed ESPE fluences exhibit a softer spectral shape compared to previous estimates, leading to significantly higher estimates of the low-energy (E <100 MeV) fluence. Consequently, ESPEs pose an even greater risk to modern technological systems than previously believed. To facilitate broader applications, the reconstructed ESPE fluences are fitted using a modified Band function which simplifies the utilization of the obtained results in various practical contexts.

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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Edit Proceedings of Science
volume
444
conference name
38th International Cosmic Ray Conference, ICRC 2023
conference location
Nagoya, Japan
conference dates
2023-07-26 - 2023-08-03
external identifiers
  • scopus:85212304869
language
English
LU publication?
yes
id
111db798-00b3-42d7-a215-c6a79409b30d
date added to LUP
2025-01-20 14:45:03
date last changed
2025-10-14 13:23:34
@inproceedings{111db798-00b3-42d7-a215-c6a79409b30d,
  abstract     = {{<p>Extreme solar particle events (ESPEs) are infrequent yet highly potent manifestations of solar activity. These events result in the production of significant amounts of cosmogenic isotopes (CIs): <sup>10</sup>Be, <sup>36</sup>Cl, and <sup>14</sup>C, which are subsequently deposited in natural stratified archives. Analyzing CI measurements from these archives allows us to assess the particle fluxes during ESPEs. In this study, we introduce a novel approach to reconstruct ESPE fluence (integral flux) by using recent modelling advancements. This method enables the integration of diverse CI data within a single comprehensive model. Within the new approach, ESPE fluence is represented as an ensemble of scaled fluence reconstructions for ground-level enhancement (GLE) events, detected by the neutron monitor network since 1956 and coupled with satellite and ionospheric measurements. The reconstructed ESPE fluences exhibit a softer spectral shape compared to previous estimates, leading to significantly higher estimates of the low-energy (E &lt;100 MeV) fluence. Consequently, ESPEs pose an even greater risk to modern technological systems than previously believed. To facilitate broader applications, the reconstructed ESPE fluences are fitted using a modified Band function which simplifies the utilization of the obtained results in various practical contexts.</p>}},
  author       = {{Koldobskiy, Sergey and Mekhaldi, Florian and Kovaltsov, Gennady and Usoskin, Ilya}},
  booktitle    = {{Edit Proceedings of Science}},
  language     = {{eng}},
  title        = {{Reconstruction of the fluence of extreme solar particle events registered in cosmogenic proxies}},
  volume       = {{444}},
  year         = {{2024}},
}