Muons are a short-lived subatomic particle, which can be produced in the atmosphere as part of a sequence of processes after a cosmic ray strikes the upper atmosphere. The detector counts the number of muons detected and also the energy (as voltage) of the detection. This page shows daily graphs of our detections.

The rates of cosmic rays hitting the Earth’s atmosphere can be affected by the activity of the Sun, with stronger magnetic fields providing a protective effect reducing the cosmic ray flux. We are investigating was of correlating the muon activity levels to events and the overall activity of the Sun.