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Observation and analysis of the anisotropic Forbush decrease of 24 March 2024

Year: 2025
Type: conference-paper
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
DOI: 10.22323/1.501.1333
Authors: Aleksandar Mishev, Nicholas P. Larsen, Eleanna Asvestari, Alejandro Sáiz, David Ruffolo, Chanoknan Banglieng, Surujhdeo Seunarine, Agnieszka Gil, Oscar García-Población, Pablo Cervino-Solana, James H. Adams Jr., Ilya Usoskin
Institutions: University of Oulu, University of Helsinki, Mahidol University, Rajamangala University of Technology, University of Wisconsin–River Falls, Nagoya University, Universidad de Alcalá
Language: English
Open Access status: hybrid
OpenAlex ID: W4414482041
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