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On the relationship between cosmic rays detected by the KACST muon detector and solar wind speed and sunspot number

A. Maghrabi, H.M. Al Dajani

in 35th International Cosmic Ray Conference

Contribution: pdf


Solar disturbances modulate cosmic rays on different time scales. Studying cosmic ray variation
is an important subject that attracts scientists from different disciplines. In this study, correlation
analyses between cosmic ray muons and both the solar wind speed and sunspot number for the
period between 2002 and 2012 have been conducted. Cosmic ray data were obtained from the
KACST muon detector in Riyadh, Saudi Arabia (24 43; 46 40; Rc =14.4 GV). We have found
that cosmic ray muons are anti-correlated with both parameters. The same analyses have been
carried out using data from the Oulu neutron monitor and comparable results with the KACST
detector have been found.