Year Month Day AAO index 2009 MAY 1 -0.521 2009 MAY 2 0.058 2009 MAY 3 0.259 2009 MAY 4 -0.192 2009 MAY 5 -1.249 2009 MAY 6 -2.198 2009 MAY 7 -2.206 2009 MAY 8 -1.607 2009 MAY 9 -1.477 2009 MAY 10 -1.355 2009 MAY 11 -0.764 2009 MAY 12 -0.147 2009 MAY 13 0.110 2009 MAY 14 -0.413 2009 MAY 15 -1.151 2009 MAY 16 -1.644 2009 MAY 17 -2.015 2009 MAY 18 -1.776 2009 MAY 19 -0.758 2009 MAY 20 0.023 2009 MAY 21 0.075 2009 MAY 22 0.316 2009 MAY 23 0.564 2009 MAY 24 -0.178 2009 MAY 25 -0.652 2009 MAY 26 -0.560 2009 MAY 27 -0.711 2009 MAY 28 -0.006 2009 MAY 29 -0.047 2009 MAY 30 -0.591 2009 MAY 31 -1.169 2009 JUN 1 -1.075 2009 JUN 2 -0.606 2009 JUN 3 -0.142 2009 JUN 4 0.140 2009 JUN 5 0.362 2009 JUN 6 0.696 2009 JUN 7 0.593 2009 JUN 8 0.784 2009 JUN 9 1.215 2009 JUN 10 1.587 2009 JUN 11 1.819 2009 JUN 12 1.507 2009 JUN 13 0.947 2009 JUN 14 0.518 2009 JUN 15 -0.363 2009 JUN 16 -0.686 2009 JUN 17 -0.248 2009 JUN 18 0.021 2009 JUN 19 -0.355 2009 JUN 20 -0.455 2009 JUN 21 -0.246 2009 JUN 22 -0.391 2009 JUN 23 -1.078 2009 JUN 24 -1.805 2009 JUN 25 -2.340 2009 JUN 26 -2.455 2009 JUN 27 -2.774 2009 JUN 28 -3.235 2009 JUN 29 -3.011 2009 JUN 30 -2.594 2009 JUL 1 -2.541 2009 JUL 2 -2.489 2009 JUL 3 -2.089 2009 JUL 4 -1.514 2009 JUL 5 -1.708 2009 JUL 6 -2.380 2009 JUL 7 -2.572 2009 JUL 8 -2.346 2009 JUL 9 -2.093 2009 JUL 10 -1.436 2009 JUL 11 -1.806 2009 JUL 12 -1.868 2009 JUL 13 -1.222 2009 JUL 14 -0.762 2009 JUL 15 -0.462 2009 JUL 16 -0.191 2009 JUL 17 0.688 2009 JUL 18 0.861 2009 JUL 19 0.151 2009 JUL 20 -0.171 2009 JUL 21 -0.231 2009 JUL 22 0.209 2009 JUL 23 0.304 2009 JUL 24 -0.304 2009 JUL 25 -1.302 2009 JUL 26 -1.621 2009 JUL 27 -1.899 2009 JUL 28 -2.003 2009 JUL 29 -1.793 2009 JUL 30 -1.435 2009 JUL 31 -0.941 2009 AUG 1 -0.870 2009 AUG 2 -0.726 2009 AUG 3 -1.005 2009 AUG 4 -1.467 2009 AUG 5 -1.601 2009 AUG 6 -0.906 2009 AUG 7 -0.227 2009 AUG 8 0.053 2009 AUG 9 0.395 2009 AUG 10 0.827 2009 AUG 11 0.199 2009 AUG 12 -0.914 2009 AUG 13 -1.566 2009 AUG 14 -2.030 2009 AUG 15 -2.161 2009 AUG 16 -1.931 2009 AUG 17 -1.888 2009 AUG 18 -1.320 2009 AUG 19 0.386 2009 AUG 20 0.705 2009 AUG 21 -0.089 2009 AUG 22 -0.467 2009 AUG 23 -0.360 2009 AUG 24 -0.077 2009 AUG 25 -0.038 2009 AUG 26 -0.464 2009 AUG 27 -0.358 2009 AUG 28 0.038 2009 AUG 29 -0.149 2009 AUG 30 -0.824 2009 AUG 31 -1.732