Observation and analysis of the anisotropic Forbush decrease of 24 March 2024
Mishev, Alexander; Larsen, Nicholas; Asvestari, Eleanna; Sáiz, Alejandro; Shea, Margaret Ann; Strauss, Du Toit; Ruffolo, David; Banglieng, Chanoknan; Seunarine, Surujhdeo; Duldig, Marc L.; Gil, Agnieszka; Blanco, Juan José; García-Población, Oscar; Cervino-Solana, Pablo; Adams, James H.; Usoskin, Ilya (2025-12-30)
Sissa Medialab
30.12.2025
Mishev, A., Larsen, N. P., Asvestari, E., Sáiz, A., Ruffolo, D., Banglieng, C., Seunarine, S., Gil, A., García-Población, O., Cervino-Solana, P., Jr., J. H. A., & Usoskin, I. (2025). Observation and analysis of the anisotropic Forbush decrease of 24 March 2024. Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025), 1333. https://doi.org/10.22323/1.501.1333
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/
© 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-202602091665
https://urn.fi/URN:NBN:fi:oulu-202602091665
Tiivistelmä
Abstract
It is known that GCR flux exhibits notable transient suppressions due to coronal mass ejections (CMEs) and co-rotating interaction regions (CIRs) in the solar wind, called Forbush decreases (FDs). FDs are observed as fast, occasionally two-step, decreases in the count rate of particle counters. The decrease is usually followed by a gradual recovery taking up to several days or even a week. A particularly strong FD, observed as suppression of the flux of galactic cosmic rays was observed by the global network of ground-based neutron monitors (NMs) on 24–25 March 2024. The decrease revealed an unusual rapid recovery leading to false ground-level enhancement alarm from the cosmic radiation warning systems. The event was highly anisotropic, with anisotropy focused nearly on the anti-sunward direction. Here we present the observations, focusing on NM records, and the corresponding analysis
It is known that GCR flux exhibits notable transient suppressions due to coronal mass ejections (CMEs) and co-rotating interaction regions (CIRs) in the solar wind, called Forbush decreases (FDs). FDs are observed as fast, occasionally two-step, decreases in the count rate of particle counters. The decrease is usually followed by a gradual recovery taking up to several days or even a week. A particularly strong FD, observed as suppression of the flux of galactic cosmic rays was observed by the global network of ground-based neutron monitors (NMs) on 24–25 March 2024. The decrease revealed an unusual rapid recovery leading to false ground-level enhancement alarm from the cosmic radiation warning systems. The event was highly anisotropic, with anisotropy focused nearly on the anti-sunward direction. Here we present the observations, focusing on NM records, and the corresponding analysis
Kokoelmat
- Avoin saatavuus [43406]
Ellei muuten mainita, aineiston lisenssi on https://creativecommons.org/licenses/by-nc-nd/4.0/