Statistics of sunspot activity
April, 2004
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 | 75.00 | 99.00 | 59.40 | 69.33 | 82.67 | 58.75 | 49.50 | 27.00 | 23.00 | 19.00 | 14.00 | 25.00 | 43.00 | 51.20 | 51.75 | 42.33 | 56.00 | 87.00 | 92.33 | 74.60 | 82.67 | 86.00 | 51.20 | 51.75 | 54.33 | 42.25 | 28.33 | 30.33 | 27.33 | 48.67 | 53.42 | 100 |
| Wn | 28.67 | 24.50 | 12.60 | 11.00 | 24.00 | 15.25 | 2.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 8.80 | 12.00 | 11.67 | 13.00 | 12.67 | 11.33 | 4.40 | 0.00 | 0.00 | 0.00 | 14.75 | 32.67 | 29.75 | 16.00 | 18.33 | 12.67 | 12.33 | 10.97 | 20.54 |
| Ws | 46.33 | 74.50 | 46.80 | 58.33 | 58.67 | 43.50 | 46.75 | 27.00 | 23.00 | 19.00 | 14.00 | 25.00 | 43.00 | 42.40 | 39.75 | 30.67 | 43.00 | 74.33 | 81.00 | 70.20 | 82.67 | 86.00 | 51.20 | 37.00 | 21.67 | 12.50 | 12.33 | 12.00 | 14.67 | 36.33 | 42.45 | 79.46 |
| n | 3.67 | 5.00 | 4.20 | 4.33 | 5.33 | 3.50 | 3.25 | 1.67 | 1.50 | 1.25 | 1.00 | 1.80 | 3.25 | 3.60 | 3.75 | 3.33 | 4.50 | 5.67 | 4.67 | 4.00 | 4.33 | 4.75 | 2.60 | 3.25 | 3.00 | 2.75 | 2.00 | 2.00 | 2.33 | 3.33 | 3.32 | 100 |
| A | 0.33 | 1.00 | 0.00 | 0.00 | 0.33 | 0.75 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.40 | 0.50 | 0.40 | 1.00 | 0.67 | 1.00 | 1.00 | 0.67 | 0.20 | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 0.00 | 0.00 | 0.00 | 0.67 | 0.33 | 0.37 | 11.04 |
| B | 0.00 | 0.00 | 0.20 | 0.00 | 1.00 | 0.25 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.00 | 0.00 | 0.50 | 2.33 | 0.33 | 0.20 | 0.33 | 2.75 | 0.00 | 1.25 | 0.33 | 0.25 | 0.00 | 0.00 | 0.00 | 1.33 | 0.42 | 12.51 |
| C | 0.67 | 1.00 | 1.00 | 0.67 | 1.00 | 0.75 | 1.00 | 0.00 | 0.50 | 0.50 | 1.00 | 1.00 | 1.00 | 0.40 | 0.50 | 1.00 | 0.50 | 0.00 | 0.33 | 0.00 | 1.33 | 1.50 | 1.40 | 1.25 | 0.67 | 0.75 | 0.33 | 0.67 | 0.33 | 0.67 | 0.72 | 21.80 |
| D | 0.67 | 0.00 | 0.80 | 1.33 | 1.00 | 1.25 | 0.50 | 1.00 | 0.50 | 0.50 | 0.00 | 0.20 | 0.25 | 0.60 | 1.00 | 0.33 | 0.00 | 1.00 | 2.33 | 2.60 | 1.33 | 0.00 | 0.60 | 0.25 | 1.00 | 1.25 | 1.00 | 0.67 | 0.00 | 0.33 | 0.74 | 22.39 |
| E | 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 | 0.00 | 0.00 | 0.00 | 0.67 | 0.33 | 0.20 | 0.67 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 2.33 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| G | 0.67 | 1.00 | 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 | 0.00 | 0.00 | 0.20 | 0.00 | 0.25 | 0.40 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.11 | 3.31 |
| H | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.45 |
| I | 1.33 | 2.00 | 1.80 | 2.33 | 2.00 | 0.50 | 0.25 | 0.33 | 0.50 | 0.25 | 0.00 | 0.20 | 1.50 | 1.60 | 1.25 | 1.33 | 2.50 | 0.67 | 0.67 | 0.60 | 0.67 | 0.00 | 0.20 | 0.00 | 0.00 | 0.25 | 0.67 | 0.67 | 1.33 | 0.67 | 0.87 | 26.17 |
| x | 0.33 | 1.00 | 0.20 | 0.00 | 1.33 | 1.00 | 1.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.40 | 0.50 | 0.80 | 1.00 | 0.67 | 1.50 | 3.33 | 1.00 | 0.40 | 0.33 | 2.75 | 0.00 | 1.50 | 1.00 | 0.25 | 0.00 | 0.00 | 0.67 | 1.67 | 0.78 | 23.56 |
| r | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.40 | 0.50 | 0.20 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.40 | 0.67 | 0.00 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.13 | 3.92 |
| s | 2.00 | 2.50 | 2.20 | 2.67 | 2.00 | 1.00 | 0.50 | 0.67 | 1.00 | 1.00 | 1.00 | 0.40 | 1.00 | 1.20 | 2.00 | 2.00 | 1.00 | 1.00 | 1.67 | 1.60 | 1.67 | 1.00 | 1.00 | 0.50 | 0.33 | 0.50 | 0.33 | 0.67 | 0.67 | 1.00 | 1.20 | 36.21 |
| a | 1.00 | 1.50 | 1.60 | 1.67 | 2.00 | 1.50 | 1.25 | 0.67 | 0.00 | 0.25 | 0.00 | 0.60 | 1.25 | 1.40 | 0.75 | 0.67 | 1.50 | 1.00 | 1.67 | 1.20 | 1.33 | 0.25 | 0.40 | 0.75 | 1.33 | 1.25 | 1.67 | 1.00 | 1.00 | 0.67 | 1.04 | 31.24 |
| h | 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 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.54 |
| k | 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 | 0.33 | 0.33 | 0.40 | 0.00 | 0.75 | 0.80 | 0.50 | 0.33 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 4.55 |
| x | 1.67 | 3.00 | 2.00 | 2.33 | 2.33 | 1.25 | 0.75 | 0.67 | 0.50 | 0.25 | 0.00 | 0.60 | 2.00 | 2.00 | 2.25 | 2.00 | 3.50 | 1.67 | 1.33 | 0.80 | 0.67 | 0.00 | 0.20 | 0.25 | 0.67 | 0.50 | 0.67 | 0.67 | 2.00 | 1.00 | 1.25 | 37.66 |
| o | 1.67 | 2.00 | 2.00 | 1.33 | 2.33 | 1.25 | 2.00 | 1.00 | 1.00 | 0.75 | 1.00 | 0.60 | 1.25 | 1.00 | 1.25 | 1.33 | 1.00 | 2.67 | 2.33 | 2.60 | 2.67 | 4.50 | 2.20 | 2.75 | 1.67 | 2.00 | 1.33 | 1.33 | 0.33 | 2.00 | 1.71 | 51.35 |
| i | 0.33 | 0.00 | 0.20 | 0.67 | 0.67 | 1.00 | 0.50 | 0.00 | 0.00 | 0.25 | 0.00 | 0.60 | 0.00 | 0.60 | 0.25 | 0.00 | 0.00 | 1.33 | 1.00 | 0.60 | 1.00 | 0.25 | 0.20 | 0.25 | 0.33 | 0.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.35 | 10.66 |
| c | 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 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.33 |
| CV | 58.00 | 52.00 | 55.40 | 56.33 | 51.67 | 42.00 | 25.00 | 24.67 | 17.00 | 19.75 | 11.00 | 14.60 | 25.25 | 35.40 | 42.00 | 30.33 | 25.00 | 59.00 | 78.67 | 80.20 | 72.67 | 50.75 | 56.00 | 38.25 | 46.33 | 59.25 | 28.33 | 25.67 | 14.67 | 23.67 | 40.63 | 100 |
| CVn | 32.67 | 18.50 | 16.60 | 10.00 | 12.00 | 3.75 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.40 | 13.00 | 9.00 | 5.50 | 6.33 | 6.33 | 4.00 | 0.00 | 0.00 | 0.00 | 10.75 | 25.00 | 29.25 | 21.00 | 13.67 | 7.33 | 8.33 | 8.69 | 21.39 |
| CVs | 25.33 | 33.50 | 38.80 | 46.33 | 39.67 | 38.25 | 24.75 | 24.67 | 17.00 | 19.75 | 11.00 | 14.60 | 25.25 | 28.00 | 29.00 | 21.33 | 19.50 | 52.67 | 72.33 | 76.20 | 72.67 | 50.75 | 56.00 | 27.50 | 21.33 | 30.00 | 7.33 | 12.00 | 7.33 | 15.33 | 31.94 | 78.61 |
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