Statistics of sunspot activity
April, 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 | 56.50 | 64.33 | 62.33 | 69.33 | 59.33 | 56.67 | 77.25 | 85.75 | 88.67 | 54.67 | 74.50 | 81.25 | 131.33 | 136.00 | 112.00 | 107.00 | 65.75 | 64.33 | 71.33 | 68.20 | 82.50 | 88.25 | 78.25 | 68.00 | 68.00 | 66.50 | 46.50 | 59.33 | 58.50 | 59.00 | 75.38 | 100 |
| Wn | 43.50 | 43.67 | 55.00 | 65.33 | 51.67 | 53.00 | 62.25 | 61.50 | 61.67 | 42.00 | 60.25 | 74.75 | 123.00 | 119.67 | 102.75 | 99.00 | 62.25 | 64.33 | 59.33 | 48.40 | 35.25 | 29.50 | 24.00 | 23.00 | 19.00 | 22.50 | 31.50 | 33.67 | 30.25 | 32.33 | 54.48 | 72.27 |
| Ws | 13.00 | 20.67 | 7.33 | 4.00 | 7.67 | 3.67 | 15.00 | 24.25 | 27.00 | 12.67 | 14.25 | 6.50 | 8.33 | 16.33 | 9.25 | 8.00 | 3.50 | 0.00 | 12.00 | 19.80 | 47.25 | 58.75 | 54.25 | 45.00 | 49.00 | 44.00 | 15.00 | 25.67 | 28.25 | 26.67 | 20.90 | 27.73 |
| n | 3.50 | 4.00 | 3.67 | 4.00 | 4.00 | 4.00 | 5.50 | 5.50 | 6.33 | 3.00 | 3.75 | 4.75 | 6.67 | 7.33 | 6.00 | 6.33 | 3.00 | 3.00 | 4.00 | 3.60 | 4.75 | 4.25 | 3.00 | 3.00 | 3.67 | 4.50 | 3.00 | 4.00 | 4.00 | 4.33 | 4.35 | 100 |
| A | 1.00 | 1.00 | 0.67 | 1.33 | 0.67 | 1.33 | 2.00 | 0.25 | 0.67 | 0.00 | 0.25 | 0.25 | 1.00 | 1.67 | 2.00 | 3.00 | 0.00 | 0.00 | 0.67 | 0.40 | 1.00 | 0.50 | 0.00 | 0.33 | 0.33 | 0.50 | 1.00 | 1.00 | 0.50 | 0.00 | 0.78 | 17.88 |
| B | 0.00 | 0.67 | 0.33 | 0.00 | 0.33 | 0.00 | 0.50 | 1.00 | 1.67 | 0.67 | 0.75 | 0.75 | 0.67 | 1.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.20 | 1.00 | 1.00 | 1.00 | 0.33 | 1.33 | 2.50 | 0.00 | 0.33 | 0.50 | 1.33 | 0.61 | 13.95 |
| C | 0.00 | 0.33 | 0.67 | 0.67 | 1.33 | 1.33 | 1.25 | 2.50 | 2.00 | 1.00 | 1.25 | 1.75 | 2.33 | 1.00 | 0.75 | 0.33 | 1.50 | 1.00 | 0.67 | 1.20 | 0.50 | 0.75 | 0.00 | 0.67 | 0.33 | 0.50 | 0.00 | 0.67 | 1.00 | 1.00 | 0.94 | 21.68 |
| D | 0.00 | 0.33 | 0.33 | 1.00 | 1.00 | 0.33 | 1.25 | 1.25 | 1.00 | 1.33 | 1.00 | 0.75 | 0.67 | 1.00 | 0.50 | 0.00 | 0.25 | 0.67 | 0.33 | 0.00 | 0.75 | 1.00 | 0.50 | 1.00 | 1.33 | 1.00 | 2.00 | 1.67 | 0.75 | 0.67 | 0.79 | 18.14 |
| E | 0.50 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 1.33 | 1.00 | 1.00 | 0.75 | 1.00 | 1.00 | 0.60 | 1.00 | 1.00 | 1.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.45 | 10.43 |
| F | 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 | 0.40 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.69 |
| G | 1.50 | 1.00 | 0.67 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.33 | 0.50 | 0.67 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.67 | 0.25 | 5.84 |
| H | 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 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.70 |
| I | 0.50 | 0.33 | 1.00 | 0.67 | 0.67 | 0.67 | 0.50 | 0.25 | 1.00 | 0.00 | 0.25 | 0.75 | 1.00 | 1.00 | 1.25 | 1.00 | 0.00 | 0.00 | 1.00 | 0.60 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.67 | 0.46 | 10.68 |
| x | 1.00 | 1.67 | 1.00 | 1.33 | 1.00 | 1.33 | 2.50 | 1.25 | 2.33 | 0.67 | 1.00 | 1.00 | 1.67 | 2.67 | 2.00 | 3.33 | 0.00 | 0.00 | 0.67 | 0.60 | 2.00 | 1.50 | 1.00 | 0.67 | 1.67 | 3.00 | 1.00 | 1.33 | 1.00 | 1.33 | 1.38 | 31.83 |
| r | 0.50 | 0.33 | 0.00 | 0.00 | 0.33 | 0.00 | 0.75 | 1.25 | 1.33 | 0.33 | 0.75 | 0.25 | 0.33 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.40 | 0.25 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.00 | 0.34 | 7.85 |
| s | 1.00 | 1.67 | 2.33 | 1.67 | 2.00 | 2.00 | 2.00 | 2.25 | 2.67 | 1.67 | 2.00 | 2.50 | 2.00 | 1.67 | 0.75 | 0.33 | 1.25 | 1.00 | 1.33 | 1.40 | 0.75 | 0.50 | 0.50 | 0.67 | 1.00 | 0.00 | 0.00 | 0.67 | 1.50 | 2.33 | 1.38 | 31.74 |
| a | 0.50 | 0.33 | 0.33 | 0.67 | 0.67 | 0.67 | 0.00 | 0.50 | 0.00 | 0.33 | 0.00 | 1.00 | 2.67 | 1.33 | 0.75 | 1.67 | 1.00 | 1.00 | 0.33 | 0.60 | 1.00 | 1.00 | 0.50 | 1.33 | 0.33 | 1.00 | 1.00 | 1.00 | 1.00 | 0.33 | 0.76 | 17.52 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.60 | 0.50 | 0.50 | 0.00 | 0.33 | 0.33 | 0.50 | 0.50 | 0.33 | 0.25 | 0.33 | 0.18 | 4.23 |
| k | 0.50 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 1.00 | 0.75 | 1.00 | 1.00 | 0.00 | 0.25 | 0.25 | 1.00 | 0.00 | 0.33 | 0.00 | 0.50 | 0.33 | 0.00 | 0.00 | 0.30 | 6.84 |
| x | 1.50 | 1.33 | 1.67 | 2.00 | 1.33 | 2.00 | 2.50 | 0.50 | 1.67 | 0.00 | 0.50 | 1.00 | 2.00 | 2.67 | 3.25 | 4.00 | 0.25 | 0.33 | 2.00 | 1.00 | 1.25 | 0.50 | 0.00 | 0.33 | 0.33 | 0.50 | 1.00 | 1.33 | 0.75 | 0.67 | 1.27 | 29.26 |
| o | 1.50 | 2.00 | 1.33 | 1.33 | 2.67 | 1.67 | 3.00 | 4.75 | 4.67 | 2.00 | 1.75 | 2.50 | 2.67 | 3.33 | 1.25 | 1.00 | 1.75 | 1.33 | 1.00 | 1.60 | 1.75 | 1.75 | 1.25 | 1.33 | 2.67 | 4.00 | 2.00 | 2.00 | 2.50 | 3.33 | 2.19 | 50.36 |
| i | 0.50 | 0.67 | 0.67 | 0.67 | 0.00 | 0.33 | 0.00 | 0.25 | 0.00 | 1.00 | 1.50 | 1.00 | 1.00 | 0.33 | 1.00 | 1.33 | 0.75 | 0.33 | 0.33 | 0.60 | 1.25 | 1.00 | 1.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.67 | 0.75 | 0.33 | 0.61 | 14.00 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 1.00 | 0.50 | 0.00 | 0.25 | 1.00 | 0.67 | 0.40 | 0.50 | 1.00 | 0.75 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.28 | 6.38 |
| CV | 63.50 | 48.33 | 43.00 | 54.00 | 42.67 | 37.67 | 53.00 | 66.50 | 51.00 | 43.33 | 46.00 | 59.50 | 80.33 | 103.00 | 104.50 | 77.00 | 69.50 | 85.00 | 88.67 | 66.00 | 79.75 | 84.50 | 79.25 | 60.67 | 64.67 | 43.50 | 66.00 | 64.33 | 61.50 | 63.33 | 65.00 | 100 |
| CVn | 39.50 | 25.00 | 36.33 | 53.67 | 42.00 | 37.33 | 50.75 | 55.75 | 43.33 | 38.33 | 44.25 | 58.75 | 79.33 | 101.00 | 103.00 | 76.00 | 66.75 | 85.00 | 86.67 | 55.80 | 52.75 | 36.25 | 35.50 | 17.67 | 15.67 | 3.00 | 20.00 | 24.67 | 41.25 | 46.33 | 49.05 | 75.47 |
| CVs | 24.00 | 23.33 | 6.67 | 0.33 | 0.67 | 0.33 | 2.25 | 10.75 | 7.67 | 5.00 | 1.75 | 0.75 | 1.00 | 2.00 | 1.50 | 1.00 | 2.75 | 0.00 | 2.00 | 10.20 | 27.00 | 48.25 | 43.75 | 43.00 | 49.00 | 40.50 | 46.00 | 39.67 | 20.25 | 17.00 | 15.95 | 24.53 |
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