Statistics of sunspot activity
April, 2005
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 | 16.33 | 32.60 | 38.50 | 38.00 | 48.00 | 43.25 | 43.20 | 39.25 | 43.00 | 40.00 | 21.40 | 30.33 | 42.00 | 48.50 | 56.75 | 43.20 | 38.25 | 39.00 | 42.25 | 30.80 | 23.00 | 22.50 | 19.00 | 11.00 | 15.50 | 21.50 | 35.00 | 52.25 | 45.67 | 51.00 | 35.70 | 100 |
| Wn | 12.00 | 11.00 | 11.00 | 8.25 | 11.33 | 3.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.33 | 27.60 | 28.50 | 30.00 | 17.40 | 16.50 | 12.60 | 16.25 | 13.00 | 11.80 | 11.00 | 11.00 | 0.00 | 0.00 | 0.00 | 4.00 | 0.00 | 0.00 | 0.00 | 8.95 | 25.08 |
| Ws | 4.33 | 21.60 | 27.50 | 29.75 | 36.67 | 40.25 | 43.20 | 39.25 | 43.00 | 40.00 | 21.40 | 18.00 | 14.40 | 20.00 | 26.75 | 25.80 | 21.75 | 26.40 | 26.00 | 17.80 | 11.20 | 11.50 | 8.00 | 11.00 | 15.50 | 21.50 | 31.00 | 52.25 | 45.67 | 51.00 | 26.75 | 74.92 |
| n | 1.33 | 2.40 | 3.00 | 2.25 | 3.33 | 3.25 | 3.00 | 2.75 | 3.00 | 3.00 | 1.40 | 2.00 | 3.00 | 3.25 | 4.00 | 3.20 | 2.75 | 2.80 | 3.00 | 2.40 | 2.00 | 2.00 | 1.67 | 1.00 | 1.25 | 1.25 | 1.67 | 2.00 | 2.33 | 2.50 | 2.43 | 100 |
| A | 0.33 | 0.80 | 0.00 | 0.00 | 0.33 | 0.25 | 0.20 | 0.00 | 0.67 | 1.00 | 0.40 | 0.00 | 0.00 | 0.25 | 0.25 | 0.40 | 0.25 | 0.40 | 0.50 | 0.00 | 0.40 | 0.50 | 0.67 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.33 | 0.25 | 0.29 | 11.93 |
| B | 0.33 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.40 | 0.50 | 1.50 | 0.20 | 0.50 | 0.00 | 0.00 | 0.60 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.25 | 0.20 | 8.15 |
| C | 0.33 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 1.40 | 1.00 | 1.00 | 0.25 | 0.80 | 0.33 | 1.80 | 0.25 | 1.00 | 1.00 | 0.75 | 1.80 | 1.00 | 0.80 | 0.20 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.33 | 1.00 | 0.33 | 0.50 | 0.55 | 22.72 |
| D | 0.00 | 0.20 | 1.00 | 0.75 | 1.00 | 1.00 | 0.20 | 0.50 | 0.67 | 1.50 | 0.20 | 1.00 | 0.60 | 1.00 | 0.50 | 0.80 | 0.50 | 0.00 | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.50 | 0.00 | 0.25 | 0.67 | 0.50 | 0.48 | 19.62 |
| 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 | 0.20 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.25 | 0.67 | 0.75 | 0.10 | 4.05 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.62 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.25 | 0.33 | 0.50 | 0.33 | 0.25 | 0.09 | 3.66 |
| I | 0.33 | 0.60 | 2.00 | 1.50 | 2.00 | 2.00 | 1.00 | 1.25 | 0.33 | 0.25 | 0.00 | 0.67 | 0.00 | 0.75 | 0.50 | 0.80 | 0.75 | 0.60 | 1.25 | 0.80 | 1.40 | 1.25 | 1.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.71 | 29.24 |
| x | 0.67 | 1.20 | 0.00 | 0.00 | 0.33 | 0.25 | 0.20 | 0.00 | 1.00 | 1.00 | 0.40 | 0.00 | 0.40 | 0.75 | 1.75 | 0.60 | 0.75 | 0.40 | 0.50 | 0.60 | 0.40 | 0.75 | 0.67 | 0.00 | 0.25 | 0.25 | 0.67 | 0.00 | 0.33 | 0.50 | 0.49 | 20.08 |
| r | 0.00 | 0.20 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.25 | 0.00 | 0.00 | 0.40 | 0.50 | 0.00 | 0.40 | 0.25 | 0.20 | 0.75 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 0.25 | 0.17 | 6.96 |
| s | 0.67 | 0.40 | 2.00 | 1.00 | 1.00 | 1.50 | 1.40 | 1.00 | 0.33 | 1.00 | 0.80 | 1.00 | 1.20 | 1.00 | 2.25 | 1.40 | 1.00 | 0.80 | 0.25 | 1.20 | 1.20 | 1.00 | 0.67 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.33 | 0.75 | 0.86 | 35.24 |
| a | 0.00 | 0.60 | 1.00 | 1.00 | 2.00 | 1.50 | 1.40 | 1.25 | 1.67 | 0.75 | 0.20 | 1.00 | 1.00 | 1.00 | 0.00 | 0.80 | 0.75 | 1.40 | 1.50 | 0.60 | 0.20 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.69 | 28.44 |
| 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 | 0.00 | 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 | 0.01 | 0.34 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.75 | 0.75 | 1.00 | 1.00 | 1.00 | 1.00 | 0.22 | 8.93 |
| x | 0.67 | 1.40 | 2.00 | 1.50 | 2.33 | 2.25 | 1.20 | 1.25 | 1.00 | 1.25 | 0.40 | 0.67 | 0.00 | 1.00 | 0.75 | 1.20 | 1.00 | 1.00 | 1.75 | 0.80 | 1.80 | 1.75 | 1.67 | 1.00 | 0.50 | 0.50 | 0.33 | 0.50 | 0.67 | 0.50 | 1.09 | 44.84 |
| o | 0.67 | 0.40 | 1.00 | 0.00 | 0.33 | 0.50 | 1.60 | 1.50 | 1.33 | 1.50 | 0.60 | 1.33 | 2.80 | 1.25 | 2.75 | 1.60 | 1.50 | 1.60 | 1.00 | 1.60 | 0.20 | 0.25 | 0.00 | 0.00 | 0.75 | 0.50 | 1.00 | 1.00 | 0.67 | 1.25 | 1.02 | 41.88 |
| i | 0.00 | 0.60 | 0.00 | 0.75 | 0.67 | 0.50 | 0.20 | 0.00 | 0.67 | 0.25 | 0.40 | 0.00 | 0.20 | 1.00 | 0.50 | 0.40 | 0.25 | 0.20 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.25 | 0.33 | 0.00 | 0.26 | 10.53 |
| 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 | 0.00 | 0.00 | 0.33 | 0.25 | 0.67 | 0.75 | 0.07 | 2.75 |
| CV | 8.00 | 14.40 | 39.00 | 30.00 | 38.33 | 40.75 | 31.00 | 27.75 | 27.33 | 38.50 | 13.40 | 31.33 | 34.20 | 42.25 | 39.25 | 34.80 | 26.00 | 21.00 | 20.75 | 21.20 | 14.80 | 12.75 | 9.67 | 37.00 | 33.75 | 44.25 | 45.00 | 53.00 | 64.67 | 68.50 | 32.09 | 100 |
| CVn | 4.33 | 4.00 | 10.00 | 5.25 | 7.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 13.00 | 25.00 | 18.75 | 21.25 | 16.00 | 13.00 | 6.60 | 10.75 | 12.20 | 10.20 | 9.25 | 9.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 6.55 | 20.41 |
| CVs | 3.67 | 10.40 | 29.00 | 24.75 | 31.33 | 40.50 | 31.00 | 27.75 | 27.33 | 38.50 | 13.40 | 18.33 | 9.20 | 23.50 | 18.00 | 18.80 | 13.00 | 14.40 | 10.00 | 9.00 | 4.60 | 3.50 | 0.67 | 37.00 | 33.75 | 44.25 | 44.33 | 53.00 | 64.67 | 68.50 | 25.54 | 79.59 |
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