Speaker
Description
A series of intense solar flares occurred in May 2024. Among other effects, a remarkable Forbush decrease in the cosmic ray flux was observed on the Earth. This event was observed by neutron and muon detectors installed at the Svalbard, in a high latitude site, characterized by a weak geomagnetic shielding. For this analysis we employed at Ny-Ålesund three scintillator-based muon telescopes of the Extreme Energy Events (EEE) project, 14 channels of a Bonner Sphere neutron Spectrometer (BSS), and thermal and epithermal neutron sensors used for hydrological monitoring and, at Barentsburg, data from a high-energy neutron monitor operated by the Polar Geophysical Institute.
Most sensors showed significant responses and correlation during the event. The observed relative magnitude of the Forbush decrease was estimated to be ≈ 9% for thermal neutrons, ≈ 8% for high-energy neutrons, and ≈ 3% for muons. A correlation analysis of the time series provided by all these detectors during May 2024 was also undertaken and will be discussed in this contribution.
| Collaboration(s) | EEE |
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