Statistics of sunspot activity
April, 2006
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 | 50.25 | 68.00 | 73.83 | 71.67 | 82.00 | 80.25 | 60.75 | 57.00 | 55.33 | 54.50 | 62.00 | 69.33 | 67.83 | 54.80 | 38.20 | 22.83 | 26.50 | 26.75 | 72.00 | 18.00 | 18.20 | 28.00 | 16.00 | 23.25 | 40.20 | 58.83 | 59.25 | 54.67 | 60.00 | 72.00 | 51.41 | 100 |
| Wn | 0.00 | 0.00 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.83 | 0.00 | 0.00 | 2.33 | 0.00 | 3.25 | 14.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.00 | 18.00 | 1.55 | 3.01 |
| Ws | 50.25 | 68.00 | 71.83 | 71.67 | 82.00 | 80.25 | 60.75 | 57.00 | 55.33 | 54.50 | 62.00 | 69.33 | 64.00 | 54.80 | 38.20 | 20.50 | 26.50 | 23.50 | 58.00 | 18.00 | 18.20 | 28.00 | 16.00 | 23.25 | 40.20 | 58.83 | 59.25 | 54.67 | 57.00 | 54.00 | 49.86 | 96.99 |
| n | 2.75 | 3.00 | 3.00 | 3.67 | 4.00 | 4.50 | 4.00 | 4.00 | 4.00 | 4.00 | 4.40 | 5.00 | 5.33 | 4.60 | 3.00 | 1.67 | 2.25 | 2.25 | 5.00 | 1.00 | 1.40 | 2.00 | 1.40 | 1.50 | 2.60 | 3.50 | 3.50 | 3.00 | 2.75 | 4.00 | 3.24 | 100 |
| A | 0.50 | 0.00 | 0.00 | 0.33 | 0.00 | 0.25 | 0.00 | 0.33 | 0.33 | 1.25 | 0.20 | 0.83 | 0.83 | 1.60 | 0.60 | 0.17 | 1.00 | 1.00 | 2.00 | 0.00 | 0.40 | 0.00 | 0.40 | 0.25 | 0.40 | 0.00 | 0.75 | 0.50 | 0.00 | 0.50 | 0.48 | 14.87 |
| B | 0.25 | 0.00 | 0.00 | 0.17 | 0.20 | 0.50 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.17 | 0.00 | 0.60 | 0.67 | 0.75 | 0.25 | 2.00 | 0.00 | 0.40 | 2.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.32 | 9.94 |
| C | 0.00 | 0.50 | 0.33 | 0.67 | 1.60 | 1.50 | 1.00 | 2.00 | 1.00 | 0.75 | 1.20 | 1.00 | 1.17 | 1.00 | 0.60 | 0.50 | 0.25 | 0.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.20 | 0.25 | 0.00 | 0.17 | 0.50 | 0.33 | 0.75 | 1.50 | 0.68 | 20.88 |
| D | 0.25 | 1.00 | 1.17 | 1.33 | 0.80 | 1.75 | 2.00 | 1.33 | 0.67 | 0.75 | 1.20 | 1.00 | 0.67 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.60 | 0.00 | 0.00 | 0.50 | 1.20 | 0.83 | 1.25 | 0.83 | 1.00 | 0.00 | 0.69 | 21.46 |
| E | 0.50 | 0.75 | 0.50 | 0.50 | 1.20 | 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 | 0.25 | 0.00 | 0.17 | 0.00 | 0.50 | 0.25 | 0.50 | 0.18 | 5.53 |
| F | 0.00 | 0.00 | 0.17 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.17 |
| G | 0.25 | 0.00 | 0.00 | 0.00 | 0.20 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.25 | 0.00 | 0.04 | 1.36 |
| H | 0.00 | 0.25 | 0.17 | 0.17 | 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 | 0.40 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 1.18 |
| I | 1.00 | 0.50 | 0.67 | 0.50 | 0.00 | 0.25 | 1.00 | 0.33 | 2.00 | 0.50 | 1.60 | 2.17 | 2.50 | 1.80 | 1.20 | 0.33 | 0.25 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 0.25 | 0.40 | 2.00 | 1.00 | 0.83 | 0.50 | 0.50 | 0.80 | 24.61 |
| x | 0.75 | 0.00 | 0.00 | 0.50 | 0.20 | 0.75 | 0.00 | 0.33 | 0.33 | 1.75 | 0.20 | 0.83 | 1.00 | 1.60 | 1.20 | 0.83 | 1.75 | 1.25 | 4.00 | 0.00 | 0.80 | 2.00 | 0.40 | 0.25 | 0.60 | 0.00 | 0.75 | 0.50 | 0.00 | 1.50 | 0.80 | 24.81 |
| r | 0.00 | 0.00 | 0.33 | 0.17 | 0.20 | 0.50 | 0.75 | 1.00 | 0.33 | 0.00 | 0.60 | 0.33 | 0.50 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.33 | 0.25 | 0.00 | 0.21 | 6.59 |
| s | 1.00 | 0.75 | 0.50 | 0.67 | 0.60 | 1.00 | 1.25 | 1.33 | 2.00 | 0.50 | 1.60 | 2.33 | 1.83 | 1.40 | 0.80 | 0.33 | 0.25 | 0.75 | 0.00 | 0.50 | 0.20 | 0.00 | 0.40 | 0.00 | 0.20 | 0.33 | 0.25 | 0.00 | 0.75 | 1.00 | 0.75 | 23.21 |
| a | 0.50 | 1.25 | 1.33 | 1.33 | 1.60 | 1.50 | 1.00 | 1.33 | 1.33 | 1.75 | 2.00 | 1.50 | 2.00 | 1.20 | 1.00 | 0.50 | 0.25 | 0.25 | 1.00 | 0.50 | 0.20 | 0.00 | 0.40 | 0.75 | 0.60 | 1.83 | 2.25 | 1.67 | 1.25 | 1.00 | 1.10 | 34.08 |
| h | 0.25 | 0.75 | 0.50 | 0.50 | 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 | 0.00 | 0.17 | 0.00 | 0.00 | 0.08 | 2.49 |
| k | 0.25 | 0.25 | 0.33 | 0.50 | 1.40 | 0.75 | 0.75 | 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 | 0.50 | 1.20 | 0.83 | 0.25 | 0.33 | 0.50 | 0.50 | 0.29 | 8.81 |
| x | 1.50 | 0.75 | 0.83 | 1.00 | 0.00 | 0.50 | 1.00 | 0.67 | 2.33 | 1.75 | 1.80 | 3.00 | 3.33 | 3.40 | 1.80 | 0.50 | 1.25 | 2.00 | 2.00 | 0.00 | 0.40 | 0.00 | 1.20 | 0.50 | 1.20 | 2.17 | 1.75 | 1.33 | 0.50 | 1.00 | 1.32 | 40.66 |
| o | 0.50 | 1.25 | 0.50 | 1.00 | 2.00 | 2.75 | 2.50 | 2.33 | 1.00 | 1.50 | 2.00 | 1.17 | 1.50 | 1.20 | 1.20 | 1.00 | 1.00 | 0.25 | 3.00 | 0.50 | 1.00 | 2.00 | 0.20 | 0.75 | 1.00 | 0.67 | 0.75 | 0.17 | 0.50 | 2.00 | 1.24 | 38.31 |
| i | 0.25 | 0.25 | 1.33 | 1.33 | 1.60 | 1.00 | 0.50 | 1.00 | 0.67 | 0.75 | 0.60 | 0.67 | 0.17 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.50 | 0.75 | 0.83 | 1.00 | 1.00 | 0.50 | 15.52 |
| c | 0.50 | 0.75 | 0.33 | 0.33 | 0.40 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.20 | 0.17 | 0.25 | 0.67 | 0.75 | 0.00 | 0.18 | 5.51 |
| CV | 51.00 | 85.25 | 75.83 | 83.00 | 103.20 | 81.25 | 85.00 | 47.33 | 43.33 | 35.50 | 53.60 | 52.67 | 49.67 | 29.00 | 17.40 | 9.00 | 7.00 | 10.75 | 14.00 | 16.50 | 12.60 | 4.00 | 14.80 | 33.50 | 64.60 | 63.17 | 47.25 | 56.67 | 63.00 | 45.00 | 45.16 | 100 |
| CVn | 0.00 | 0.00 | 1.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 5.67 | 0.00 | 0.00 | 0.33 | 0.00 | 2.50 | 8.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.75 | 7.00 | 0.91 | 2.02 |
| CVs | 51.00 | 85.25 | 74.67 | 83.00 | 103.20 | 81.25 | 85.00 | 47.33 | 43.33 | 35.50 | 53.60 | 52.67 | 44.00 | 29.00 | 17.40 | 8.67 | 7.00 | 8.25 | 6.00 | 16.50 | 12.60 | 4.00 | 14.80 | 33.50 | 64.60 | 63.17 | 47.25 | 56.67 | 60.25 | 38.00 | 44.25 | 97.98 |
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