Statistics of sunspot activity
April, 2015
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 | 50.75 | 42.50 | 24.00 | 59.00 | 57.67 | 74.67 | 67.33 | 58.67 | 59.33 | 45.75 | 55.50 | 90.33 | 112.67 | 113.00 | 93.50 | 94.67 | 133.67 | 154.50 | 146.50 | 129.75 | 136.75 | 147.67 | 98.60 | 90.00 | 76.50 | 82.50 | 51.67 | 45.50 | 31.50 | 22.33 | 81.56 | 100 |
| Wn | 17.00 | 23.00 | 24.00 | 30.00 | 26.00 | 29.67 | 22.33 | 17.67 | 16.33 | 15.75 | 26.75 | 47.67 | 56.67 | 84.75 | 82.50 | 90.67 | 96.33 | 103.50 | 105.50 | 94.50 | 78.00 | 80.33 | 65.40 | 50.25 | 35.00 | 31.50 | 13.67 | 16.00 | 10.50 | 0.00 | 46.37 | 56.86 |
| Ws | 33.75 | 19.50 | 0.00 | 29.00 | 31.67 | 45.00 | 45.00 | 41.00 | 43.00 | 30.00 | 28.75 | 42.67 | 56.00 | 28.25 | 11.00 | 4.00 | 37.33 | 51.00 | 41.00 | 35.25 | 58.75 | 67.33 | 33.20 | 39.75 | 41.50 | 51.00 | 38.00 | 29.50 | 21.00 | 22.33 | 35.18 | 43.14 |
| n | 4.00 | 3.00 | 1.67 | 4.00 | 3.67 | 4.00 | 2.67 | 3.00 | 3.00 | 2.50 | 3.75 | 6.33 | 7.33 | 7.50 | 5.50 | 5.00 | 7.33 | 9.50 | 8.50 | 8.00 | 9.00 | 10.00 | 7.00 | 6.25 | 4.75 | 5.50 | 3.67 | 3.75 | 2.50 | 1.67 | 5.14 | 100 |
| A | 1.00 | 0.75 | 0.67 | 0.00 | 0.67 | 1.33 | 0.67 | 1.00 | 1.00 | 0.75 | 1.00 | 0.00 | 1.33 | 0.75 | 0.50 | 0.00 | 0.67 | 1.50 | 1.50 | 0.25 | 0.50 | 1.67 | 1.00 | 0.50 | 0.50 | 0.00 | 0.67 | 1.00 | 1.50 | 0.33 | 0.77 | 14.90 |
| B | 1.25 | 0.25 | 0.00 | 1.50 | 0.67 | 0.33 | 0.33 | 0.33 | 0.67 | 0.75 | 0.75 | 0.67 | 2.00 | 0.75 | 0.75 | 0.33 | 1.33 | 3.00 | 0.50 | 2.00 | 0.75 | 2.00 | 0.80 | 0.50 | 0.00 | 1.00 | 0.33 | 0.75 | 0.50 | 0.00 | 0.83 | 16.07 |
| C | 0.75 | 0.00 | 0.00 | 1.50 | 0.33 | 1.33 | 0.00 | 0.33 | 0.33 | 0.25 | 0.25 | 2.67 | 1.00 | 1.50 | 1.25 | 2.67 | 3.00 | 1.50 | 2.50 | 4.00 | 4.75 | 3.00 | 2.40 | 1.75 | 0.75 | 2.00 | 1.33 | 0.50 | 0.00 | 0.67 | 1.41 | 27.42 |
| D | 0.00 | 1.00 | 1.00 | 1.00 | 1.33 | 1.00 | 1.67 | 0.33 | 0.00 | 0.25 | 1.50 | 1.00 | 1.33 | 2.25 | 1.25 | 1.00 | 1.00 | 2.00 | 2.50 | 1.50 | 2.00 | 2.33 | 0.80 | 1.00 | 1.00 | 1.00 | 1.00 | 0.25 | 0.00 | 0.33 | 1.09 | 21.14 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.67 | 0.75 | 0.25 | 0.33 | 0.67 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.21 | 4.16 |
| 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 | 0.50 | 0.33 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.86 |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 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 | 0.02 | 0.43 |
| H | 0.50 | 0.50 | 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 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.25 | 0.50 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.11 | 2.20 |
| I | 0.50 | 0.50 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 0.67 | 1.50 | 1.00 | 0.33 | 0.33 | 1.00 | 0.50 | 0.25 | 1.00 | 1.00 | 1.60 | 2.00 | 2.00 | 1.50 | 0.33 | 1.00 | 0.50 | 0.33 | 0.66 | 12.81 |
| x | 2.25 | 1.00 | 0.67 | 1.50 | 1.33 | 1.67 | 1.00 | 1.33 | 1.67 | 1.50 | 1.75 | 0.67 | 3.33 | 1.50 | 1.25 | 0.33 | 2.00 | 4.50 | 2.00 | 2.25 | 1.25 | 3.67 | 1.80 | 1.00 | 0.50 | 1.00 | 1.00 | 1.75 | 2.00 | 0.33 | 1.59 | 30.97 |
| r | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.25 | 2.33 | 0.00 | 0.75 | 0.50 | 0.67 | 0.33 | 0.50 | 1.00 | 0.75 | 1.25 | 1.00 | 0.40 | 0.25 | 0.00 | 0.50 | 0.00 | 0.00 | 0.25 | 0.33 | 0.41 | 7.93 |
| s | 0.00 | 1.25 | 0.33 | 2.00 | 1.00 | 0.33 | 0.67 | 0.33 | 0.00 | 0.00 | 0.25 | 2.00 | 1.67 | 1.75 | 1.00 | 0.33 | 1.33 | 1.50 | 2.50 | 2.00 | 2.75 | 3.00 | 1.60 | 3.00 | 2.50 | 2.00 | 1.33 | 0.75 | 0.00 | 0.67 | 1.26 | 24.52 |
| a | 0.25 | 0.25 | 0.67 | 0.50 | 1.33 | 2.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.50 | 0.00 | 1.33 | 2.00 | 2.00 | 2.67 | 2.00 | 2.50 | 2.00 | 1.75 | 2.75 | 1.33 | 2.20 | 1.50 | 1.25 | 2.00 | 1.33 | 0.75 | 0.25 | 0.33 | 1.35 | 26.21 |
| h | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.20 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 2.40 |
| k | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.67 | 1.50 | 0.75 | 1.00 | 1.67 | 0.50 | 0.50 | 1.25 | 1.00 | 1.00 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.41 | 7.97 |
| x | 2.00 | 1.75 | 0.67 | 0.00 | 1.33 | 1.33 | 0.67 | 1.00 | 1.00 | 0.75 | 1.25 | 1.33 | 2.33 | 2.25 | 1.50 | 0.33 | 1.33 | 2.50 | 2.00 | 0.50 | 1.50 | 2.67 | 3.00 | 2.75 | 3.00 | 1.50 | 1.00 | 2.25 | 2.00 | 0.67 | 1.54 | 29.91 |
| o | 2.00 | 0.75 | 0.67 | 4.00 | 1.33 | 1.33 | 0.33 | 0.67 | 1.00 | 0.75 | 1.75 | 5.00 | 4.00 | 3.50 | 3.00 | 3.00 | 3.00 | 6.00 | 5.50 | 6.25 | 6.25 | 6.00 | 3.60 | 2.00 | 0.75 | 3.50 | 2.00 | 1.50 | 0.50 | 1.00 | 2.70 | 52.44 |
| i | 0.00 | 0.50 | 0.33 | 0.00 | 1.00 | 0.67 | 0.67 | 1.00 | 0.33 | 0.50 | 0.25 | 0.00 | 0.00 | 0.75 | 0.25 | 0.67 | 2.33 | 0.00 | 0.00 | 1.00 | 0.50 | 0.67 | 0.20 | 1.25 | 0.75 | 0.50 | 0.67 | 0.00 | 0.00 | 0.00 | 0.49 | 9.58 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 0.33 | 0.67 | 0.50 | 0.50 | 0.00 | 1.00 | 1.00 | 0.75 | 1.00 | 0.67 | 1.00 | 1.00 | 0.25 | 0.75 | 0.67 | 0.20 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.42 | 8.07 |
| CV | 46.50 | 51.25 | 22.67 | 43.00 | 41.67 | 41.33 | 50.33 | 38.00 | 33.00 | 26.00 | 41.75 | 100.33 | 107.00 | 136.00 | 87.50 | 95.33 | 125.00 | 107.50 | 139.00 | 112.50 | 129.00 | 122.33 | 88.20 | 86.50 | 72.25 | 55.00 | 40.33 | 37.25 | 5.25 | 14.33 | 69.87 | 100 |
| CVn | 2.50 | 25.25 | 22.67 | 23.00 | 16.67 | 13.00 | 18.67 | 11.00 | 3.00 | 2.00 | 18.50 | 76.00 | 82.00 | 117.75 | 83.50 | 94.67 | 112.00 | 78.00 | 107.50 | 91.75 | 88.00 | 78.33 | 61.40 | 39.75 | 37.75 | 18.50 | 6.67 | 4.00 | 1.00 | 0.00 | 44.49 | 63.68 |
| CVs | 44.00 | 26.00 | 0.00 | 20.00 | 25.00 | 28.33 | 31.67 | 27.00 | 30.00 | 24.00 | 23.25 | 24.33 | 25.00 | 18.25 | 4.00 | 0.67 | 13.00 | 29.50 | 31.50 | 20.75 | 41.00 | 44.00 | 26.80 | 46.75 | 34.50 | 36.50 | 33.67 | 33.25 | 4.25 | 14.33 | 25.38 | 36.32 |
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