Year Month Day AO index 2004 AUG 1 -0.421 2004 AUG 2 -0.842 2004 AUG 3 -1.051 2004 AUG 4 -1.239 2004 AUG 5 -1.388 2004 AUG 6 -1.295 2004 AUG 7 -1.392 2004 AUG 8 -1.514 2004 AUG 9 -1.634 2004 AUG 10 -1.691 2004 AUG 11 -1.442 2004 AUG 12 -1.134 2004 AUG 13 -0.822 2004 AUG 14 -0.330 2004 AUG 15 0.145 2004 AUG 16 0.126 2004 AUG 17 -0.647 2004 AUG 18 -1.311 2004 AUG 19 -1.428 2004 AUG 20 -1.060 2004 AUG 21 -1.014 2004 AUG 22 -0.958 2004 AUG 23 -0.667 2004 AUG 24 -0.297 2004 AUG 25 -0.093 2004 AUG 26 0.198 2004 AUG 27 0.490 2004 AUG 28 0.491 2004 AUG 29 0.276 2004 AUG 30 0.288 2004 AUG 31 0.122 2004 SEP 1 -0.097 2004 SEP 2 0.071 2004 SEP 3 0.469 2004 SEP 4 0.721 2004 SEP 5 0.522 2004 SEP 6 0.248 2004 SEP 7 0.155 2004 SEP 8 0.260 2004 SEP 9 0.900 2004 SEP 10 1.252 2004 SEP 11 1.592 2004 SEP 12 2.219 2004 SEP 13 1.903 2004 SEP 14 1.625 2004 SEP 15 1.750 2004 SEP 16 1.851 2004 SEP 17 1.469 2004 SEP 18 1.068 2004 SEP 19 0.801 2004 SEP 20 0.472 2004 SEP 21 0.197 2004 SEP 22 0.199 2004 SEP 23 -0.019 2004 SEP 24 0.302 2004 SEP 25 0.729 2004 SEP 26 0.669 2004 SEP 27 0.662 2004 SEP 28 0.986 2004 SEP 29 0.961 2004 SEP 30 0.798 2004 OCT 1 0.614 2004 OCT 2 0.317 2004 OCT 3 -0.229 2004 OCT 4 -0.515 2004 OCT 5 -0.265 2004 OCT 6 -0.147 2004 OCT 7 -0.168 2004 OCT 8 -0.562 2004 OCT 9 -0.768 2004 OCT 10 -1.425 2004 OCT 11 -1.281 2004 OCT 12 -0.578 2004 OCT 13 -0.265 2004 OCT 14 -0.492 2004 OCT 15 -1.050 2004 OCT 16 -1.576 2004 OCT 17 -2.042 2004 OCT 18 -2.377 2004 OCT 19 -2.040 2004 OCT 20 -1.307 2004 OCT 21 -0.507 2004 OCT 22 -0.289 2004 OCT 23 -0.018 2004 OCT 24 -0.071 2004 OCT 25 -0.923 2004 OCT 26 -1.123 2004 OCT 27 -0.454 2004 OCT 28 0.128 2004 OCT 29 0.527 2004 OCT 30 1.403 2004 OCT 31 2.069 2004 NOV 1 1.729 2004 NOV 2 1.097 2004 NOV 3 1.027 2004 NOV 4 1.020 2004 NOV 5 1.244 2004 NOV 6 1.213 2004 NOV 7 1.058 2004 NOV 8 1.210 2004 NOV 9 1.149 2004 NOV 10 1.141 2004 NOV 11 1.355 2004 NOV 12 1.264 2004 NOV 13 1.044 2004 NOV 14 1.274 2004 NOV 15 1.819 2004 NOV 16 1.660 2004 NOV 17 1.283 2004 NOV 18 0.580 2004 NOV 19 0.090 2004 NOV 20 -0.580 2004 NOV 21 -0.369 2004 NOV 22 -0.336 2004 NOV 23 -0.625 2004 NOV 24 -0.319 2004 NOV 25 -0.268 2004 NOV 26 -0.617 2004 NOV 27 -0.514 2004 NOV 28 0.103 2004 NOV 29 0.438 2004 NOV 30 0.451