Mishev A.Larsen N.Asvestari E.Sáiz A.Shea M.A.Strauss D.T.Ruffolo D.Banglieng C.Seunarine S.Duldig M.L.Gil A.Blanco J.J.García-Población O.Cervino-Solana P.Adams J.H.Usoskin I.Mahidol University2026-02-082026-02-082025-12-30Proceedings of Science Vol.501 (2025)https://repository.li.mahidol.ac.th/handle/123456789/114898It 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.MultidisciplinaryConference PaperSCOPUS10.22323/1.501.13332-s2.0-10502906793018248039