The observed spectrum of long-term cosmic ray variations in minimum solar activity 2009

The method for determination of the long-term rigidity spectrum of the cosmic ray (CR) variations within the range R=1-50 GV was presented in our previous works on the base of CR observations with the different detectors. In this paper meson telescope data (Nagoya) are added. The monthly averages of the CR intensity during 1974-2011 are used to investigate rigidity spectrum of the CR maximum in 24th cycle and compare with other cycles. The main focus is specific features of CR modulation at a prolonged minimum of solar cycle 24, when maximum CR intensity was higher than it was during the other maxima. It has been found the best fitting for rigidity dependence of CR variations. The main results are: a) the power of the 11-yr cycle is different from one cycle to next; b) the maximum 24th cycle (2009) exceeds the previously established maximum flux of CR; c) the spectral index, obtained from different sets of CR detectors, shows that resulting spectrum becomes steeper with increasing of CR energy