Measurement of the cosmic-ray rate over the period 2019–2025 at very high latitude (78.9°N)

Since 2019, the Extreme Energy Events (EEE) Project has installed three muon detection stations at the Svalbard Islands (78.9 degrees N\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$78.9<^>{\circ } \hbox {N}$$\end{document} latitude), employing scintillator-based detectors. This initiative represents the first systematic effort to monitor cosmic-muons rates at high geomagnetic latitudes beyond the Arctic Circle, with the objective of improving our understanding of cosmic-ray propagation and modulation in polar regions. The present study analyses temporal variations in the muon detection rates over a six-year period (2019-2025), including the study of periodic modulations and underlying trends in the observed rates.