The first GLE (# 73 – 28-Oct-2021) of solar cycle 25: a study using space-borne and NM data
Mishev, Aleksander; Kocharov, Leon; Koldobskiy, Sergey; Larsen, Nicholas; Riihonen, Esa; Vainio, Rami; Usoskin, Ilya (2023-12-14)
Sissa Medialab
14.12.2023
Mishev, A., Kocharov, L., Koldobskiy, S., Larsen, N., Riihonen, E., Vainio, R., & Usoskin, I. (2023). The first GLE (# 73 – 28-Oct-2021) of solar cycle 25: A study using space-borne and NM data. Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS), 030. https://doi.org/10.22323/1.423.0030
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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
https://creativecommons.org/licenses/by-nc-nd/4.0/
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
https://creativecommons.org/licenses/by-nc-nd/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202312153814
https://urn.fi/URN:NBN:fi:oulu-202312153814
Tiivistelmä
Abstract
The first solar proton event of solar cycle 25 was detected on 28 October 2021 by several neutron monitors (NMs) in the polar region; the strongest signal was registered by the DOMC/DOMB monitors located at the Antarctic plateau at Concordia French-Italian research station, as well as the fleet of space-borne instruments. It is identified as the GLE (ground-level enhancement) # 73 in the International GLE database. Here, we report the observations and the study of this event on the basis of the global NM network and SOHO/ERNE records. We present the derived angular and spectral features of solar energetic protons, including their dynamical evolution throughout the event employing a state-of-the-art model based on analysis of the neutron monitor data. We discuss the origin of the prompt and delayed components of the GLE-inducing solar protons. Several applications of the derived results are discussed.
The first solar proton event of solar cycle 25 was detected on 28 October 2021 by several neutron monitors (NMs) in the polar region; the strongest signal was registered by the DOMC/DOMB monitors located at the Antarctic plateau at Concordia French-Italian research station, as well as the fleet of space-borne instruments. It is identified as the GLE (ground-level enhancement) # 73 in the International GLE database. Here, we report the observations and the study of this event on the basis of the global NM network and SOHO/ERNE records. We present the derived angular and spectral features of solar energetic protons, including their dynamical evolution throughout the event employing a state-of-the-art model based on analysis of the neutron monitor data. We discuss the origin of the prompt and delayed components of the GLE-inducing solar protons. Several applications of the derived results are discussed.
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