Statistics of sunspot activity
April, 2003
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 | 147.33 | 181.00 | 141.25 | 131.50 | 103.50 | 85.00 | 70.67 | 52.00 | 78.50 | 72.00 | 47.75 | 56.00 | 59.25 | 61.50 | 50.33 | 34.50 | 45.50 | 46.67 | 55.25 | 80.00 | 143.00 | 128.50 | 118.75 | 157.33 | 182.67 | 185.00 | 196.00 | 187.00 | 206.50 | 160.67 | 108.83 | 100 |
| Wn | 56.33 | 74.00 | 64.00 | 55.50 | 48.25 | 36.33 | 33.67 | 36.33 | 49.00 | 38.33 | 33.25 | 33.33 | 32.50 | 31.00 | 24.00 | 2.75 | 17.50 | 15.33 | 24.75 | 41.25 | 70.00 | 70.25 | 85.00 | 104.67 | 128.67 | 106.00 | 75.67 | 50.33 | 47.00 | 37.67 | 50.76 | 46.64 |
| Ws | 91.00 | 107.00 | 77.25 | 76.00 | 55.25 | 48.67 | 37.00 | 15.67 | 29.50 | 33.67 | 14.50 | 22.67 | 26.75 | 30.50 | 26.33 | 31.75 | 28.00 | 31.33 | 30.50 | 38.75 | 73.00 | 58.25 | 33.75 | 52.67 | 54.00 | 79.00 | 120.33 | 136.67 | 159.50 | 123.00 | 58.08 | 53.36 |
| n | 8.00 | 8.67 | 7.25 | 7.00 | 6.50 | 6.00 | 5.67 | 4.00 | 5.25 | 4.67 | 3.00 | 3.00 | 4.00 | 4.25 | 4.00 | 2.25 | 3.50 | 3.67 | 4.25 | 5.25 | 7.33 | 6.75 | 5.75 | 8.33 | 9.00 | 10.33 | 10.00 | 8.67 | 8.00 | 8.33 | 6.09 | 100 |
| A | 0.00 | 0.67 | 0.00 | 0.25 | 1.00 | 1.00 | 0.33 | 0.33 | 0.75 | 1.00 | 0.50 | 0.33 | 0.00 | 0.25 | 0.33 | 0.75 | 0.50 | 0.33 | 0.25 | 0.25 | 1.67 | 1.00 | 1.00 | 1.67 | 1.00 | 0.67 | 0.33 | 0.67 | 0.50 | 0.00 | 0.58 | 9.49 |
| B | 0.00 | 0.00 | 0.25 | 0.25 | 0.50 | 0.00 | 0.33 | 0.67 | 0.25 | 1.00 | 0.25 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.75 | 0.67 | 0.75 | 0.75 | 0.00 | 0.25 | 0.00 | 0.67 | 1.67 | 1.67 | 1.33 | 1.67 | 0.50 | 0.00 | 0.49 | 8.07 |
| C | 1.67 | 1.00 | 1.25 | 2.50 | 1.25 | 0.67 | 1.33 | 0.67 | 1.50 | 1.67 | 1.75 | 1.67 | 2.25 | 1.75 | 1.00 | 1.25 | 0.50 | 0.67 | 0.50 | 0.25 | 1.67 | 1.25 | 1.50 | 1.33 | 1.33 | 2.00 | 1.00 | 0.67 | 1.00 | 1.00 | 1.26 | 20.71 |
| D | 2.33 | 3.67 | 3.50 | 1.75 | 1.75 | 3.33 | 0.67 | 0.67 | 2.25 | 0.67 | 0.50 | 0.67 | 1.25 | 1.50 | 1.33 | 0.00 | 0.25 | 0.00 | 0.50 | 1.50 | 2.00 | 3.00 | 1.50 | 3.33 | 3.33 | 3.33 | 5.67 | 4.33 | 5.50 | 4.00 | 2.14 | 35.08 |
| E | 1.33 | 1.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.25 | 1.00 | 0.67 | 0.33 | 1.00 | 0.67 | 0.33 | 0.00 | 0.67 | 0.27 | 4.38 |
| 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 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.18 |
| G | 0.00 | 0.33 | 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 | 0.00 | 0.25 | 0.33 | 0.25 | 0.25 | 0.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.50 | 0.33 | 0.12 | 2.01 |
| H | 0.33 | 0.00 | 0.50 | 1.00 | 1.25 | 0.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.21 | 3.42 |
| I | 2.33 | 2.00 | 0.75 | 1.00 | 0.75 | 1.00 | 2.33 | 1.33 | 0.50 | 0.33 | 0.00 | 0.00 | 0.50 | 0.25 | 0.33 | 0.25 | 1.50 | 1.67 | 2.00 | 2.00 | 1.33 | 0.75 | 0.50 | 0.67 | 1.00 | 1.67 | 1.00 | 0.67 | 0.00 | 2.00 | 1.01 | 16.65 |
| x | 0.00 | 0.67 | 0.25 | 0.50 | 1.50 | 1.00 | 0.67 | 1.00 | 1.00 | 2.00 | 0.75 | 0.67 | 0.00 | 0.50 | 0.33 | 0.75 | 1.25 | 1.00 | 1.00 | 1.00 | 1.67 | 1.25 | 1.00 | 2.33 | 2.67 | 2.33 | 1.67 | 2.33 | 1.00 | 0.00 | 1.07 | 17.56 |
| r | 0.33 | 1.33 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.67 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | 0.50 | 0.50 | 0.00 | 0.00 | 0.33 | 0.33 | 0.33 | 0.00 | 0.33 | 0.25 | 4.06 |
| s | 2.00 | 2.33 | 2.00 | 1.75 | 0.75 | 1.33 | 1.33 | 1.67 | 1.25 | 1.00 | 0.50 | 0.67 | 2.00 | 1.75 | 2.00 | 0.25 | 1.50 | 1.33 | 1.00 | 2.00 | 1.33 | 2.50 | 1.50 | 3.00 | 2.00 | 3.00 | 3.00 | 1.67 | 2.00 | 3.00 | 1.71 | 28.15 |
| a | 4.67 | 3.00 | 3.50 | 2.75 | 2.00 | 1.67 | 1.67 | 0.00 | 1.75 | 0.67 | 0.50 | 0.67 | 1.25 | 0.75 | 0.00 | 1.25 | 0.25 | 1.00 | 2.00 | 1.25 | 2.33 | 1.75 | 2.00 | 2.00 | 3.33 | 3.00 | 3.67 | 2.33 | 3.50 | 2.67 | 1.91 | 31.30 |
| h | 0.33 | 0.33 | 0.75 | 1.00 | 0.50 | 0.33 | 0.67 | 0.67 | 0.00 | 0.33 | 0.75 | 0.67 | 0.75 | 0.75 | 1.00 | 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 | 0.29 | 4.84 |
| k | 0.67 | 1.00 | 0.75 | 0.75 | 1.50 | 1.67 | 1.33 | 0.67 | 1.00 | 0.67 | 0.25 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 1.00 | 1.00 | 0.75 | 0.75 | 1.00 | 1.00 | 1.67 | 1.33 | 2.00 | 1.50 | 2.33 | 0.86 | 14.10 |
| x | 2.67 | 2.67 | 1.25 | 2.25 | 3.00 | 2.00 | 3.33 | 2.00 | 1.25 | 1.33 | 0.50 | 0.33 | 0.50 | 0.75 | 1.67 | 1.00 | 2.00 | 2.33 | 2.50 | 2.25 | 3.00 | 1.75 | 1.50 | 2.33 | 2.00 | 2.33 | 1.33 | 1.33 | 0.50 | 2.33 | 1.80 | 29.56 |
| o | 4.00 | 3.33 | 4.50 | 3.25 | 1.75 | 3.33 | 2.33 | 2.00 | 3.75 | 2.67 | 2.50 | 2.33 | 3.00 | 3.25 | 2.33 | 1.25 | 1.50 | 1.33 | 1.50 | 2.75 | 2.67 | 3.50 | 3.00 | 5.00 | 6.00 | 6.33 | 7.33 | 5.33 | 6.00 | 5.00 | 3.43 | 56.30 |
| i | 0.33 | 2.33 | 1.25 | 1.00 | 1.50 | 0.67 | 0.00 | 0.00 | 0.25 | 0.67 | 0.00 | 0.33 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 1.67 | 1.50 | 1.00 | 0.67 | 0.67 | 1.67 | 1.33 | 1.67 | 0.50 | 0.67 | 0.70 | 11.45 |
| c | 1.00 | 0.33 | 0.25 | 0.50 | 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 | 0.25 | 0.33 | 0.33 | 0.00 | 0.00 | 0.33 | 1.00 | 0.33 | 0.16 | 2.69 |
| CV | 150.00 | 172.00 | 162.75 | 142.75 | 129.75 | 138.67 | 109.33 | 77.33 | 89.50 | 64.00 | 57.50 | 60.00 | 77.25 | 85.25 | 82.00 | 13.25 | 25.00 | 35.00 | 42.25 | 89.25 | 108.00 | 116.75 | 96.25 | 137.00 | 136.67 | 168.00 | 185.00 | 170.67 | 182.50 | 194.33 | 109.93 | 100 |
| CVn | 65.00 | 86.00 | 98.00 | 94.00 | 93.75 | 87.33 | 84.67 | 66.67 | 67.00 | 46.00 | 44.50 | 50.00 | 51.25 | 50.25 | 46.33 | 1.75 | 9.25 | 11.67 | 10.25 | 34.50 | 48.67 | 64.50 | 58.00 | 80.00 | 74.67 | 103.00 | 76.67 | 56.00 | 44.00 | 69.67 | 59.11 | 53.77 |
| CVs | 85.00 | 86.00 | 64.75 | 48.75 | 36.00 | 51.33 | 24.67 | 10.67 | 22.50 | 18.00 | 13.00 | 10.00 | 26.00 | 35.00 | 35.67 | 11.50 | 15.75 | 23.33 | 32.00 | 54.75 | 59.33 | 52.25 | 38.25 | 57.00 | 62.00 | 65.00 | 108.33 | 114.67 | 138.50 | 124.67 | 50.82 | 46.23 |
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