CaLMa a neutron monitor in Iberian peninsula

Castilla-La Mancha neutron monitor (CaLMa) is a cosmic ray observatory located in Guadalajara (Spain). Its geographical location (40°38′N, 3°9′W) , its height above see level (708 m) and its vertical rigidity cut-off (6.97 GV). CaLMa is sensitive to cosmic rays with energies above 6 MeV (primary cosmic rays: protons). Cosmic rays are strongly modulated by solar activity at these energies, this fact convert CaLMa in a ground-base observatory of solar activity. Enhancements in CaLMa's count-rate can be observed caused by strong solar flares and shock-driven by coronal mass ejections. Decreases in CaLMa's count-rate are caused by solar wind disturbances arriving Earth. Interplanetary shock waves, interplanetary coronal ejections and interaction regions use to produce these decreases (Forbush decreases). CaLMa is in operation since October 2011 and among its observations we find more than 20 Forbush decreases and the evolution of the current solar cycle. CaLMa is also part of the neutron monitor global network and provide real-time data to the neutron monitor data base.