Year Month Day AAO index 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 2009 SEP 1 -2.081 2009 SEP 2 -1.907 2009 SEP 3 -1.294 2009 SEP 4 -0.279 2009 SEP 5 0.035 2009 SEP 6 0.096 2009 SEP 7 0.656 2009 SEP 8 1.266 2009 SEP 9 1.468 2009 SEP 10 1.578 2009 SEP 11 1.488 2009 SEP 12 0.954 2009 SEP 13 0.763 2009 SEP 14 0.457 2009 SEP 15 -0.096 2009 SEP 16 -0.493 2009 SEP 17 -0.610 2009 SEP 18 -0.465 2009 SEP 19 -0.480 2009 SEP 20 -0.681 2009 SEP 21 -1.079 2009 SEP 22 -1.735 2009 SEP 23 -2.414 2009 SEP 24 -2.401 2009 SEP 25 -1.405 2009 SEP 26 -0.057 2009 SEP 27 1.382 2009 SEP 28 2.738 2009 SEP 29 2.539 2009 SEP 30 1.507 2009 OCT 1 0.554 2009 OCT 2 0.137 2009 OCT 3 -0.012 2009 OCT 4 0.646 2009 OCT 5 1.226 2009 OCT 6 1.791 2009 OCT 7 1.774 2009 OCT 8 1.146 2009 OCT 9 0.985 2009 OCT 10 0.347 2009 OCT 11 -0.791 2009 OCT 12 -1.756 2009 OCT 13 -1.030 2009 OCT 14 -0.016 2009 OCT 15 0.528 2009 OCT 16 0.389 2009 OCT 17 0.027 2009 OCT 18 -0.104 2009 OCT 19 -0.300 2009 OCT 20 -0.661 2009 OCT 21 -0.589 2009 OCT 22 -0.446 2009 OCT 23 -0.874 2009 OCT 24 -1.140 2009 OCT 25 -0.449 2009 OCT 26 0.755 2009 OCT 27 0.822 2009 OCT 28 -0.450 2009 OCT 29 -0.942 2009 OCT 30 -0.070 2009 OCT 31 0.961