month Messina RC Messina RC 1 7.4 0.8 0.926 0.992 2 4.9 0.5 0.951 0.995 3 5.1 0.4 0.949 0.996 4 4.5 0.8 0.955 0.992 5 2.2 0.5 0.978 0.995 6 2.3 0.5 0.977 0.995 7 1.7 0.7 0.983 0.993 8 3.4 0.6 0.966 0.994 9 6.2 0.7 0.938 0.993 10 6.4 0.7 0.936 0.993 11 7.5 0.7 0.925 0.993 12 6.2 0.6 0.938 0.994