Statistics of sunspot activity
September, 2011
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 | 142.00 | 105.50 | 117.25 | 97.25 | 94.25 | 81.25 | 62.00 | 47.25 | 66.25 | 77.00 | 82.25 | 114.00 | 96.60 | 146.75 | 163.00 | 179.75 | 137.00 | 140.50 | 130.33 | 107.50 | 84.40 | 85.50 | 79.00 | 88.00 | 102.50 | 108.00 | 94.33 | 107.40 | 111.50 | 90.50 | 104.63 | 100 |
| Wn | 104.50 | 85.00 | 91.75 | 71.25 | 66.00 | 54.25 | 37.00 | 35.75 | 37.25 | 46.00 | 47.75 | 66.00 | 54.00 | 86.75 | 113.00 | 124.50 | 97.00 | 121.75 | 109.67 | 90.75 | 70.40 | 71.25 | 73.50 | 79.50 | 88.00 | 100.67 | 94.33 | 107.40 | 111.50 | 87.75 | 80.81 | 77.23 |
| Ws | 37.50 | 20.50 | 25.50 | 26.00 | 28.25 | 27.00 | 25.00 | 11.50 | 29.00 | 31.00 | 34.50 | 48.00 | 42.60 | 60.00 | 50.00 | 55.25 | 40.00 | 18.75 | 20.67 | 16.75 | 14.00 | 14.25 | 5.50 | 8.50 | 14.50 | 7.33 | 0.00 | 0.00 | 0.00 | 2.75 | 23.82 | 22.77 |
| n | 6.75 | 6.25 | 7.00 | 5.75 | 5.50 | 4.75 | 4.00 | 3.00 | 4.00 | 5.25 | 5.25 | 8.33 | 6.40 | 10.00 | 10.25 | 10.75 | 8.00 | 7.00 | 7.33 | 6.00 | 4.60 | 5.00 | 4.00 | 4.75 | 5.75 | 5.00 | 5.00 | 5.60 | 6.50 | 5.25 | 6.10 | 100 |
| A | 0.25 | 0.00 | 1.00 | 0.50 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 2.33 | 1.00 | 0.50 | 0.75 | 0.50 | 0.00 | 0.25 | 0.33 | 0.25 | 0.80 | 1.50 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.60 | 1.00 | 0.75 | 0.50 | 8.23 |
| B | 0.25 | 0.50 | 0.50 | 0.00 | 0.50 | 0.50 | 0.50 | 0.00 | 0.25 | 0.50 | 1.00 | 1.67 | 0.60 | 1.50 | 0.75 | 0.50 | 1.50 | 1.00 | 1.00 | 0.75 | 0.40 | 0.50 | 0.00 | 0.50 | 1.50 | 0.33 | 0.33 | 1.40 | 1.50 | 0.50 | 0.69 | 11.33 |
| C | 0.75 | 0.75 | 1.50 | 2.50 | 1.75 | 1.75 | 2.00 | 1.25 | 1.75 | 0.50 | 0.75 | 1.67 | 2.80 | 5.00 | 2.50 | 3.00 | 1.25 | 1.75 | 2.67 | 0.50 | 1.40 | 0.00 | 0.00 | 0.75 | 1.00 | 1.33 | 0.67 | 1.20 | 1.50 | 1.00 | 1.51 | 24.72 |
| D | 3.75 | 2.50 | 1.50 | 1.75 | 0.00 | 0.00 | 0.50 | 0.50 | 1.25 | 3.00 | 2.00 | 1.00 | 1.40 | 2.00 | 4.50 | 5.50 | 3.50 | 3.25 | 1.67 | 3.00 | 0.40 | 0.00 | 0.50 | 0.50 | 0.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.50 | 1.52 | 24.84 |
| E | 0.00 | 0.25 | 0.00 | 0.00 | 1.00 | 0.75 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.80 | 1.00 | 1.50 | 1.25 | 0.75 | 0.67 | 0.00 | 0.00 | 0.00 | 0.25 | 0.30 | 4.90 |
| F | 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 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 0.50 | 0.33 | 1.00 | 1.00 | 0.50 | 0.50 | 0.15 | 2.50 |
| G | 0.00 | 0.25 | 0.50 | 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 | 0.25 | 0.00 | 0.33 | 0.25 | 0.40 | 1.50 | 0.75 | 0.75 | 0.50 | 0.33 | 0.33 | 0.00 | 0.50 | 0.25 | 0.23 | 3.77 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.50 | 0.75 | 0.33 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 1.68 |
| I | 1.75 | 2.00 | 2.00 | 1.00 | 1.75 | 1.25 | 0.50 | 1.00 | 0.50 | 1.00 | 1.25 | 1.67 | 0.60 | 0.75 | 1.50 | 1.25 | 1.00 | 0.00 | 1.00 | 1.00 | 0.40 | 0.25 | 0.00 | 0.00 | 1.50 | 1.33 | 2.33 | 1.40 | 1.50 | 1.50 | 1.10 | 18.02 |
| x | 0.50 | 0.50 | 1.50 | 0.50 | 1.00 | 0.75 | 0.50 | 0.00 | 0.25 | 0.75 | 1.25 | 4.00 | 1.60 | 2.00 | 1.50 | 1.00 | 1.50 | 1.25 | 1.33 | 1.00 | 1.20 | 2.00 | 1.00 | 1.00 | 1.50 | 0.33 | 0.33 | 2.00 | 2.50 | 1.25 | 1.19 | 19.56 |
| r | 0.50 | 0.25 | 1.00 | 0.25 | 0.50 | 0.25 | 0.00 | 0.00 | 0.50 | 1.00 | 0.50 | 0.00 | 0.40 | 1.25 | 1.75 | 2.00 | 0.75 | 0.50 | 0.67 | 1.25 | 0.60 | 0.00 | 0.00 | 0.50 | 0.50 | 0.33 | 0.67 | 0.20 | 0.00 | 0.25 | 0.55 | 8.94 |
| s | 3.50 | 3.50 | 3.25 | 2.75 | 2.00 | 2.25 | 1.00 | 1.00 | 0.75 | 1.75 | 2.00 | 2.67 | 2.20 | 2.50 | 2.25 | 2.75 | 1.75 | 2.50 | 3.67 | 2.75 | 1.60 | 0.75 | 1.00 | 1.00 | 2.75 | 3.00 | 2.67 | 2.20 | 2.50 | 2.75 | 2.23 | 36.61 |
| a | 1.50 | 1.25 | 1.25 | 2.25 | 1.75 | 1.00 | 0.50 | 0.75 | 1.25 | 0.75 | 0.50 | 0.67 | 1.40 | 3.25 | 3.75 | 3.50 | 2.25 | 1.00 | 1.00 | 0.50 | 0.60 | 1.25 | 0.75 | 0.50 | 0.00 | 0.33 | 0.33 | 0.00 | 0.50 | 0.00 | 1.14 | 18.76 |
| h | 0.75 | 0.75 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 0.75 | 0.75 | 0.50 | 0.75 | 0.67 | 0.20 | 0.50 | 0.50 | 0.50 | 1.00 | 1.25 | 0.67 | 0.50 | 0.20 | 0.25 | 0.50 | 0.75 | 0.25 | 0.33 | 0.00 | 0.20 | 0.00 | 0.00 | 0.47 | 7.66 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 1.00 | 0.50 | 0.50 | 0.50 | 0.25 | 0.33 | 0.60 | 0.50 | 0.50 | 1.00 | 0.75 | 0.50 | 0.00 | 0.00 | 0.40 | 0.75 | 0.75 | 1.00 | 0.75 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 0.52 | 8.47 |
| x | 2.00 | 2.00 | 3.00 | 1.50 | 2.25 | 1.75 | 1.00 | 1.00 | 0.50 | 1.25 | 1.50 | 4.00 | 1.60 | 1.50 | 2.50 | 1.75 | 1.50 | 1.00 | 1.67 | 1.25 | 1.20 | 2.00 | 1.00 | 0.50 | 1.50 | 1.33 | 2.33 | 2.00 | 2.50 | 2.25 | 1.70 | 27.94 |
| o | 4.00 | 3.25 | 3.50 | 3.50 | 2.25 | 2.00 | 2.50 | 1.75 | 3.00 | 3.75 | 3.75 | 4.33 | 4.80 | 8.50 | 7.00 | 8.00 | 6.00 | 4.50 | 5.00 | 3.50 | 2.40 | 2.00 | 1.00 | 2.50 | 3.00 | 2.33 | 1.67 | 2.60 | 3.50 | 2.25 | 3.60 | 59.08 |
| i | 0.25 | 0.75 | 0.50 | 0.75 | 0.75 | 1.00 | 0.50 | 0.25 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.75 | 0.25 | 1.00 | 0.00 | 0.75 | 0.20 | 0.00 | 0.00 | 0.50 | 0.25 | 0.33 | 0.33 | 0.20 | 0.00 | 0.25 | 0.37 | 6.05 |
| c | 0.50 | 0.25 | 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 | 0.25 | 0.25 | 0.50 | 0.67 | 0.50 | 0.80 | 1.00 | 2.00 | 1.25 | 1.00 | 1.00 | 0.67 | 0.80 | 0.50 | 0.50 | 0.42 | 6.93 |
| CV | 134.50 | 120.50 | 79.25 | 72.25 | 64.25 | 65.00 | 98.00 | 73.50 | 85.00 | 100.75 | 90.25 | 91.67 | 86.00 | 126.00 | 158.25 | 193.50 | 159.50 | 152.25 | 111.33 | 109.00 | 77.20 | 99.75 | 122.00 | 132.25 | 103.50 | 108.67 | 97.67 | 90.60 | 85.00 | 90.25 | 105.92 | 100 |
| CVn | 99.50 | 94.50 | 62.00 | 53.00 | 46.50 | 46.25 | 82.50 | 63.50 | 66.75 | 75.75 | 68.00 | 64.00 | 56.20 | 83.25 | 122.75 | 148.50 | 126.75 | 139.25 | 100.67 | 97.75 | 73.00 | 98.00 | 121.50 | 130.50 | 96.25 | 102.00 | 97.67 | 90.60 | 85.00 | 90.00 | 89.40 | 84.40 |
| CVs | 35.00 | 26.00 | 17.25 | 19.25 | 17.75 | 18.75 | 15.50 | 10.00 | 18.25 | 25.00 | 22.25 | 27.67 | 29.80 | 42.75 | 35.50 | 45.00 | 32.75 | 13.00 | 10.67 | 11.25 | 4.20 | 1.75 | 0.50 | 1.75 | 7.25 | 6.67 | 0.00 | 0.00 | 0.00 | 0.25 | 16.53 | 15.60 |
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