Year Month Day AO index 2010 FEB 1 -2.596 2010 FEB 2 -2.300 2010 FEB 3 -2.750 2010 FEB 4 -3.806 2010 FEB 5 -4.706 2010 FEB 6 -5.205 2010 FEB 7 -5.005 2010 FEB 8 -4.734 2010 FEB 9 -4.459 2010 FEB 10 -4.266 2010 FEB 11 -4.638 2010 FEB 12 -4.758 2010 FEB 13 -4.945 2010 FEB 14 -5.132 2010 FEB 15 -4.730 2010 FEB 16 -4.292 2010 FEB 17 -4.125 2010 FEB 18 -3.943 2010 FEB 19 -4.026 2010 FEB 20 -4.320 2010 FEB 21 -4.462 2010 FEB 22 -4.403 2010 FEB 23 -4.591 2010 FEB 24 -4.211 2010 FEB 25 -3.818 2010 FEB 26 -3.230 2010 FEB 27 -3.118 2010 FEB 28 -2.625 2010 MAR 1 -2.170 2010 MAR 2 -1.999 2010 MAR 3 -1.656 2010 MAR 4 -1.296 2010 MAR 5 -0.512 2010 MAR 6 0.130 2010 MAR 7 0.214 2010 MAR 8 0.229 2010 MAR 9 0.719 2010 MAR 10 0.915 2010 MAR 11 0.474 2010 MAR 12 -0.081 2010 MAR 13 -0.271 2010 MAR 14 -0.124 2010 MAR 15 -0.052 2010 MAR 16 0.162 2010 MAR 17 1.031 2010 MAR 18 1.304 2010 MAR 19 1.188 2010 MAR 20 1.063 2010 MAR 21 0.460 2010 MAR 22 0.267 2010 MAR 23 -0.202 2010 MAR 24 -1.079 2010 MAR 25 -1.596 2010 MAR 26 -1.900 2010 MAR 27 -2.169 2010 MAR 28 -2.251 2010 MAR 29 -1.572 2010 MAR 30 -1.432 2010 MAR 31 -1.645 2010 APR 1 -1.241 2010 APR 2 -0.674 2010 APR 3 -0.420 2010 APR 4 -0.812 2010 APR 5 -0.571 2010 APR 6 0.040 2010 APR 7 0.123 2010 APR 8 -0.392 2010 APR 9 -1.032 2010 APR 10 -1.280 2010 APR 11 -0.930 2010 APR 12 -0.168 2010 APR 13 0.781 2010 APR 14 0.915 2010 APR 15 0.739 2010 APR 16 0.544 2010 APR 17 -0.077 2010 APR 18 -0.569 2010 APR 19 -0.849 2010 APR 20 -0.868 2010 APR 21 -0.625 2010 APR 22 -0.656 2010 APR 23 -1.213 2010 APR 24 -1.339 2010 APR 25 -0.907 2010 APR 26 -0.472 2010 APR 27 0.484 2010 APR 28 1.373 2010 APR 29 1.333 2010 APR 30 0.818 2010 MAY 1 0.329 2010 MAY 2 -0.043 2010 MAY 3 -0.090 2010 MAY 4 -0.602 2010 MAY 5 -1.132 2010 MAY 6 -1.574 2010 MAY 7 -1.861 2010 MAY 8 -1.737 2010 MAY 9 -1.557 2010 MAY 10 -1.317 2010 MAY 11 -0.788 2010 MAY 12 -0.262 2010 MAY 13 -0.318 2010 MAY 14 -0.707 2010 MAY 15 -1.090 2010 MAY 16 -1.256 2010 MAY 17 -1.150 2010 MAY 18 -0.946 2010 MAY 19 -0.840 2010 MAY 20 -0.545 2010 MAY 21 -0.330 2010 MAY 22 -0.194 2010 MAY 23 -0.033 2010 MAY 24 -0.429 2010 MAY 25 -1.062 2010 MAY 26 -1.947 2010 MAY 27 -2.282 2010 MAY 28 -1.734 2010 MAY 29 -1.009 2010 MAY 30 -0.595 2010 MAY 31 -0.364