Observations of cosmic ray flux decreases with the Extreme Energy Events telescope array.
Gnesi I. per la Collaborazione EEE
The Extreme Energy Events Project is an array of 52 tracking telescopes (growing), each made of three MRPCs, covering 10 degrees in latitude and 11 in longitude. The typical Cosmic Ray (CR) flux measured by a station varies from 15 to 50 Hz, depending on set-up, that allows for extended monitoring of sudden CR flux decreases (Forbush Decreases - FD). The effect is of interest for understanding phenomena occuring on the Sun's corona, namely mass ejection and flares, which are not yet completely understood. FD are also linked to geomagnetic disturbances, even if only for hints of a common interplanetary source.