Observation and analysis of the anisotropic Forbush decrease of 24 March 2024
Issued Date
2025-12-30
Resource Type
eISSN
18248039
Scopus ID
2-s2.0-105029067930
Journal Title
Proceedings of Science
Volume
501
Rights Holder(s)
SCOPUS
Bibliographic Citation
Proceedings of Science Vol.501 (2025)
Suggested Citation
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. Observation and analysis of the anisotropic Forbush decrease of 24 March 2024. Proceedings of Science Vol.501 (2025). doi:10.22323/1.501.1333 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/114898
Title
Observation and analysis of the anisotropic Forbush decrease of 24 March 2024
Author's Affiliation
Helsingin Yliopisto
Nagoya University
Oulun Yliopisto
University of Tasmania
Universidad de Alcalá
North-West University
Faculty of Science, Mahidol University
Siedlce University of Natural Sciences and Humanities
Rajamangala University of Technology Thanyaburi (RMUTT)
University of Wisconsin-River Falls
Center for Space Plasma and Aeronomic Research
Sodankylä Geophysical Observatory
Nagoya University
Oulun Yliopisto
University of Tasmania
Universidad de Alcalá
North-West University
Faculty of Science, Mahidol University
Siedlce University of Natural Sciences and Humanities
Rajamangala University of Technology Thanyaburi (RMUTT)
University of Wisconsin-River Falls
Center for Space Plasma and Aeronomic Research
Sodankylä Geophysical Observatory
Corresponding Author(s)
Other Contributor(s)
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.