Statistics of sunspot activity
April, 2012
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 | 49.33 | 67.00 | 63.33 | 56.67 | 49.50 | 45.33 | 32.00 | 29.67 | 18.50 | 23.00 | 26.00 | 50.00 | 43.50 | 53.67 | 67.00 | 82.00 | 62.00 | 97.50 | 133.50 | 164.67 | 147.33 | 120.00 | 162.00 | 130.33 | 110.00 | 105.00 | 88.33 | 111.33 | 99.00 | 90.00 | 79.25 | 100.00 | |
| Wn | 25.33 | 34.00 | 36.33 | 37.67 | 44.00 | 45.33 | 32.00 | 29.67 | 18.50 | 23.00 | 14.00 | 23.33 | 38.00 | 46.33 | 49.67 | 60.00 | 40.50 | 39.00 | 46.00 | 54.33 | 41.67 | 45.00 | 59.00 | 53.33 | 57.00 | 55.00 | 47.33 | 47.33 | 30.67 | 25.00 | 39.94 | 50.40 | |
| Ws | 24.00 | 33.00 | 27.00 | 19.00 | 5.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.00 | 26.67 | 5.50 | 7.33 | 17.33 | 22.00 | 21.50 | 58.50 | 87.50 | 110.33 | 105.67 | 75.00 | 103.00 | 77.00 | 53.00 | 50.00 | 41.00 | 64.00 | 68.33 | 65.00 | 39.31 | 49.60 | |
| n | 4.00 | 5.00 | 4.00 | 3.67 | 3.00 | 2.67 | 2.00 | 2.00 | 1.50 | 2.00 | 2.00 | 3.33 | 2.50 | 3.00 | 4.33 | 5.00 | 4.00 | 5.50 | 6.00 | 7.00 | 5.67 | 5.00 | 5.50 | 6.00 | 7.00 | 6.33 | 5.33 | 6.67 | 7.00 | 5.33 | 4.41 | 100.00 | |
| A | 0.67 | 0.00 | 0.00 | 0.33 | 0.50 | 1.00 | 0.50 | 0.00 | 0.50 | 2.00 | 1.00 | 1.33 | 1.00 | 1.00 | 1.00 | 2.00 | 0.00 | 1.00 | 0.50 | 0.33 | 0.33 | 0.00 | 0.50 | 1.00 | 1.00 | 1.00 | 0.00 | 0.67 | 0.67 | 0.67 | 0.68 | 15.49 | |
| B | 1.00 | 0.67 | 1.33 | 0.33 | 0.50 | 0.00 | 0.50 | 0.67 | 0.50 | 0.00 | 0.00 | 0.67 | 0.50 | 0.33 | 1.33 | 1.00 | 0.50 | 0.00 | 0.50 | 1.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.67 | 0.67 | 0.00 | 1.00 | 1.00 | 0.33 | 0.52 | 11.84 | |
| C | 0.00 | 2.00 | 1.33 | 1.67 | 0.00 | 0.67 | 0.50 | 0.33 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.67 | 0.67 | 0.00 | 1.00 | 0.50 | 2.00 | 1.00 | 0.67 | 0.00 | 0.50 | 1.00 | 1.00 | 1.33 | 1.33 | 1.67 | 2.00 | 2.00 | 0.83 | 18.77 | |
| D | 1.00 | 1.67 | 0.33 | 0.33 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 1.00 | 1.33 | 0.00 | 1.00 | 2.50 | 3.00 | 3.33 | 3.00 | 4.00 | 3.00 | 1.67 | 3.00 | 3.00 | 3.33 | 2.67 | 2.33 | 1.00 | 1.51 | 34.13 | |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.67 | 1.00 | 0.00 | 1.00 | 0.67 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.19 | 4.28 | |
| 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 | 2.00 | 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 | 0.07 | 1.51 | |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.50 | 1.00 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.67 | 0.16 | 3.53 | |
| H | 0.33 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 1.26 | |
| I | 1.00 | 0.33 | 0.67 | 1.00 | 0.50 | 0.33 | 0.50 | 1.00 | 0.50 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.67 | 1.00 | 0.33 | 0.41 | 9.19 | |
| x | 1.67 | 0.67 | 1.33 | 0.67 | 1.00 | 1.00 | 1.00 | 0.67 | 1.00 | 2.00 | 1.00 | 2.00 | 1.50 | 1.33 | 2.33 | 3.00 | 0.50 | 1.00 | 1.00 | 1.33 | 0.67 | 0.00 | 0.50 | 1.33 | 1.67 | 1.67 | 0.00 | 1.67 | 1.67 | 1.00 | 1.21 | 27.33 | |
| r | 0.33 | 0.67 | 0.00 | 0.00 | 0.50 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.67 | 0.00 | 0.00 | 0.50 | 0.50 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.33 | 0.67 | 0.67 | 0.33 | 0.26 | 5.92 | |
| s | 1.67 | 3.33 | 2.33 | 2.33 | 1.50 | 1.33 | 1.00 | 0.67 | 0.50 | 0.00 | 0.50 | 1.00 | 0.50 | 0.67 | 1.00 | 2.00 | 1.50 | 2.50 | 3.00 | 1.33 | 2.00 | 1.50 | 0.50 | 2.33 | 2.00 | 3.00 | 2.67 | 3.33 | 3.00 | 2.00 | 1.70 | 38.54 | |
| a | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.50 | 0.33 | 0.50 | 0.33 | 0.33 | 0.00 | 2.00 | 1.00 | 0.50 | 1.67 | 1.00 | 2.00 | 2.00 | 1.00 | 1.00 | 1.00 | 1.67 | 1.00 | 1.00 | 1.00 | 0.69 | 15.74 | |
| h | 0.33 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 0.33 | 0.50 | 1.00 | 0.33 | 0.67 | 0.33 | 0.33 | 0.00 | 0.33 | 1.00 | 0.25 | 5.67 | |
| k | 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 | 0.50 | 0.00 | 1.33 | 1.33 | 1.00 | 1.50 | 1.00 | 1.33 | 0.33 | 0.33 | 0.00 | 0.33 | 0.00 | 0.30 | 6.80 | |
| x | 2.00 | 0.67 | 1.00 | 1.33 | 1.00 | 1.33 | 1.00 | 1.00 | 1.00 | 2.00 | 1.00 | 2.00 | 1.00 | 1.00 | 1.00 | 2.00 | 1.00 | 2.00 | 0.50 | 1.00 | 0.67 | 0.00 | 0.50 | 1.33 | 1.67 | 1.33 | 0.00 | 1.33 | 1.67 | 1.00 | 1.14 | 25.94 | |
| o | 2.00 | 4.00 | 2.33 | 2.00 | 1.00 | 1.00 | 0.50 | 0.67 | 0.50 | 0.00 | 1.00 | 1.00 | 1.00 | 1.00 | 2.33 | 1.00 | 3.00 | 2.00 | 3.50 | 3.67 | 2.67 | 2.50 | 3.00 | 3.00 | 4.67 | 3.67 | 4.33 | 4.33 | 5.00 | 4.00 | 2.36 | 53.40 | |
| i | 0.00 | 0.33 | 0.67 | 0.33 | 1.00 | 0.33 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 1.00 | 2.00 | 0.00 | 1.00 | 1.50 | 0.67 | 0.67 | 1.50 | 1.50 | 1.67 | 0.33 | 1.00 | 0.67 | 1.00 | 0.33 | 0.33 | 0.67 | 15.24 | |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.50 | 1.67 | 1.67 | 1.00 | 0.50 | 0.00 | 0.33 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.24 | 5.42 | |
| CV | 47.00 | 78.67 | 46.33 | 36.00 | 41.50 | 28.00 | 12.50 | 12.33 | 6.50 | 2.00 | 10.50 | 28.00 | 25.50 | 31.00 | 41.33 | 64.00 | 51.00 | 98.00 | 125.50 | 167.67 | 157.67 | 160.50 | 171.00 | 128.33 | 156.33 | 111.67 | 124.33 | 87.67 | 104.00 | 99.67 | 75.15 | 100.00 | |
| CVn | 9.67 | 43.33 | 21.33 | 25.00 | 36.50 | 28.00 | 12.50 | 12.33 | 6.50 | 2.00 | 9.50 | 19.33 | 25.00 | 30.33 | 25.00 | 34.00 | 31.50 | 34.00 | 47.50 | 55.00 | 54.33 | 46.00 | 51.50 | 43.33 | 85.00 | 56.67 | 62.67 | 38.00 | 37.00 | 23.00 | 33.53 | 44.61 | |
| CVs | 37.33 | 35.33 | 25.00 | 11.00 | 5.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 8.67 | 0.50 | 0.67 | 16.33 | 30.00 | 19.50 | 64.00 | 78.00 | 112.67 | 103.33 | 114.50 | 119.50 | 85.00 | 71.33 | 55.00 | 61.67 | 49.67 | 67.00 | 76.67 | 41.62 | 55.39 | |
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