Statistics of sunspot activity
September, 2004
Visual indices of solar activity by National Geophysical Data Center
| Date | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | Average | % |
| W | 17.00 | 16.40 | 23.60 | 35.25 | 61.50 | 52.00 | 59.40 | 68.40 | 68.40 | 69.75 | 66.25 | 64.80 | 62.50 | 52.20 | 67.25 | 64.40 | 63.20 | 47.00 | 43.75 | 48.75 | 32.00 | 22.20 | 18.00 | 16.00 | 14.25 | 22.00 | 24.40 | 15.40 | 39.60 | 50.00 | 43.52 | 100 |
| Wn | 0.00 | 4.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.40 | 17.75 | 28.25 | 38.00 | 38.50 | 50.00 | 56.00 | 50.20 | 39.40 | 24.25 | 21.75 | 16.50 | 11.50 | 0.00 | 0.00 | 2.20 | 0.00 | 0.00 | 0.00 | 2.20 | 17.20 | 22.80 | 14.95 | 34.35 |
| Ws | 17.00 | 11.80 | 23.60 | 35.25 | 61.50 | 52.00 | 59.40 | 68.40 | 61.00 | 52.00 | 38.00 | 26.80 | 24.00 | 2.20 | 11.25 | 14.20 | 23.80 | 22.75 | 22.00 | 32.25 | 20.50 | 22.20 | 18.00 | 13.80 | 14.25 | 22.00 | 24.40 | 13.20 | 22.40 | 27.20 | 28.57 | 65.65 |
| n | 1.50 | 1.40 | 2.00 | 2.75 | 4.50 | 3.40 | 3.40 | 3.40 | 3.60 | 4.00 | 3.50 | 3.20 | 3.00 | 1.40 | 2.25 | 2.40 | 2.20 | 2.00 | 2.50 | 2.50 | 2.00 | 1.00 | 1.00 | 1.20 | 1.25 | 2.00 | 2.20 | 1.40 | 3.40 | 4.20 | 2.49 | 100 |
| A | 0.50 | 0.40 | 0.20 | 0.50 | 1.50 | 0.40 | 0.20 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.25 | 0.40 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.20 | 0.40 | 1.00 | 0.23 | 9.39 |
| B | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.40 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 0.40 | 0.10 | 4.02 |
| C | 0.00 | 0.00 | 0.20 | 0.50 | 1.00 | 0.40 | 1.00 | 0.40 | 0.20 | 0.25 | 0.75 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 1.25 | 1.00 | 0.25 | 0.25 | 0.00 | 0.25 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 1.00 | 0.37 | 14.89 |
| D | 0.00 | 0.00 | 0.40 | 0.50 | 0.25 | 1.40 | 1.20 | 1.60 | 1.80 | 2.75 | 0.50 | 1.00 | 0.50 | 0.60 | 0.25 | 0.20 | 0.20 | 0.50 | 0.50 | 1.50 | 0.75 | 0.80 | 0.75 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.61 | 24.61 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.50 | 0.00 | 0.50 | 0.40 | 0.75 | 0.80 | 0.60 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 5.37 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.34 |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.60 | 0.25 | 0.25 | 0.25 | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 2.68 |
| H | 0.00 | 0.40 | 0.60 | 0.75 | 0.75 | 0.20 | 0.60 | 0.60 | 0.60 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.21 | 8.32 |
| I | 1.00 | 0.60 | 0.60 | 0.50 | 0.25 | 0.60 | 0.20 | 0.40 | 0.80 | 0.50 | 1.50 | 1.20 | 2.00 | 0.20 | 0.75 | 0.60 | 0.00 | 0.00 | 0.50 | 0.00 | 0.75 | 0.00 | 0.00 | 0.00 | 0.75 | 1.75 | 2.20 | 1.20 | 2.00 | 1.80 | 0.76 | 30.38 |
| x | 0.50 | 0.40 | 0.20 | 0.50 | 2.25 | 0.80 | 0.40 | 0.40 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.20 | 0.25 | 0.40 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.20 | 1.20 | 1.40 | 0.33 | 13.41 |
| r | 0.00 | 0.00 | 0.20 | 0.25 | 0.25 | 0.00 | 0.20 | 0.00 | 0.00 | 0.50 | 0.25 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.20 | 0.13 | 5.03 |
| s | 0.50 | 0.20 | 0.40 | 0.75 | 0.00 | 1.00 | 1.00 | 0.20 | 0.40 | 0.75 | 1.50 | 1.00 | 1.00 | 0.00 | 0.25 | 0.40 | 0.20 | 0.25 | 0.75 | 0.25 | 0.50 | 0.40 | 1.00 | 0.80 | 0.50 | 1.75 | 1.80 | 0.60 | 1.00 | 1.60 | 0.69 | 27.83 |
| a | 0.50 | 0.40 | 0.60 | 0.50 | 1.25 | 1.20 | 1.00 | 2.00 | 2.60 | 2.00 | 1.75 | 2.00 | 1.50 | 1.20 | 1.25 | 1.20 | 1.20 | 1.50 | 1.00 | 0.50 | 0.50 | 0.40 | 0.00 | 0.00 | 0.25 | 0.00 | 0.40 | 0.60 | 1.00 | 1.00 | 0.98 | 39.30 |
| h | 0.00 | 0.00 | 0.40 | 0.25 | 0.25 | 0.40 | 0.20 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.50 | 0.75 | 0.20 | 0.00 | 0.00 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.16 | 6.30 |
| k | 0.00 | 0.40 | 0.20 | 0.50 | 0.50 | 0.00 | 0.60 | 0.80 | 0.60 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.40 | 0.60 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 8.12 |
| x | 1.50 | 1.40 | 1.40 | 1.75 | 2.50 | 1.20 | 1.00 | 1.40 | 1.40 | 1.00 | 1.50 | 1.20 | 2.00 | 0.40 | 1.25 | 1.20 | 0.00 | 0.00 | 0.50 | 0.25 | 0.75 | 0.00 | 0.00 | 0.20 | 1.25 | 2.00 | 2.20 | 1.40 | 2.40 | 2.80 | 1.20 | 48.09 |
| o | 0.00 | 0.00 | 0.60 | 0.75 | 1.75 | 1.40 | 1.80 | 0.60 | 1.20 | 1.50 | 1.00 | 1.20 | 0.00 | 0.00 | 0.00 | 0.20 | 1.20 | 1.25 | 1.50 | 1.75 | 1.00 | 0.80 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.40 | 0.80 | 32.06 |
| i | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.80 | 0.60 | 1.20 | 1.00 | 1.50 | 1.00 | 0.80 | 0.50 | 0.80 | 0.75 | 0.80 | 0.80 | 0.75 | 0.50 | 0.50 | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 17.44 |
| c | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.20 | 0.25 | 0.20 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 2.41 |
| CV | 9.00 | 20.00 | 37.60 | 50.50 | 46.00 | 56.40 | 66.60 | 70.60 | 71.40 | 90.75 | 49.50 | 40.20 | 42.50 | 25.80 | 46.50 | 46.60 | 53.60 | 35.50 | 42.25 | 58.00 | 57.25 | 28.20 | 21.50 | 20.40 | 26.75 | 27.50 | 20.80 | 10.40 | 20.00 | 26.60 | 40.62 | 100 |
| CVn | 0.00 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.80 | 22.00 | 24.50 | 22.60 | 27.00 | 24.40 | 31.25 | 24.40 | 17.00 | 11.75 | 10.75 | 16.25 | 8.75 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.20 | 2.80 | 7.80 | 8.66 | 21.32 |
| CVs | 9.00 | 19.60 | 37.60 | 50.50 | 46.00 | 56.40 | 66.60 | 70.60 | 63.60 | 68.75 | 25.00 | 17.60 | 15.50 | 1.40 | 15.25 | 22.20 | 36.60 | 23.75 | 31.50 | 41.75 | 48.50 | 28.20 | 21.50 | 20.20 | 26.75 | 27.50 | 20.80 | 10.20 | 17.20 | 18.80 | 31.96 | 78.68 |
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