Figure 1From: Search for solar neutrons at Mount Chacaltaya associated with M- and X-class flares during the rising period of solar cycle 24On the left, typical counting rate for 1 day recorded by the NM-64. The red line shows the running average for 30 min. On the right, a 5-min count rate occurrence histogram for the NM-64 on 7 February 2012. Indicated error bars are Poissonian ±1σ.Back to article page