Global Network of Muon Detectors (GMDN)

Global Network of Muon Detectors (GNMD) is a network of multidirectional muon telescopes distributed in four countries, covering global rage of asymptotic telescope views. The muon telescopes that compose the GNMD are installed in Nagoya (Japan), Hobart (Australia), Martinho da Serra (Brazil), and Kuwait (Kuwait).

Using GNMD data it was possible to a observe a cosmic ray precursor for the magnetic storm occurred at December 2006 (Dst -150 nT).This occurred approximately 8 hours before the storm sudden commencement (SSC).