Statistics of sunspot activity
April, 2010
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 | 24.80 | 27.00 | 23.20 | 35.80 | 32.40 | 35.50 | 29.80 | 25.40 | 13.20 | 11.00 | 13.00 | 17.60 | 12.75 | 12.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.00 | 11.33 | 11.00 | 11.00 | 12.00 | 0.00 | 11.00 | 11.20 | 11.00 | 15.67 | 13.96 | 100 |
| Wn | 12.00 | 13.60 | 11.00 | 22.60 | 18.60 | 29.75 | 27.40 | 25.40 | 11.00 | 11.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.00 | 11.33 | 11.00 | 11.00 | 12.00 | 0.00 | 11.00 | 11.20 | 11.00 | 15.67 | 9.59 | 68.69 |
| Ws | 12.80 | 13.40 | 12.20 | 13.20 | 13.80 | 5.75 | 2.40 | 0.00 | 2.20 | 0.00 | 13.00 | 17.60 | 12.75 | 12.00 | 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 | 4.37 | 31.31 |
| n | 2.00 | 2.00 | 1.60 | 2.60 | 2.40 | 2.50 | 2.40 | 2.20 | 1.20 | 1.00 | 1.00 | 1.40 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 1.00 | 1.00 | 1.33 | 1.12 | 100 |
| A | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.25 | 0.60 | 0.80 | 0.20 | 0.75 | 0.00 | 0.60 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 0.80 | 1.00 | 0.67 | 0.41 | 36.37 |
| B | 0.00 | 0.00 | 0.00 | 0.40 | 0.40 | 0.00 | 0.20 | 0.20 | 0.00 | 0.00 | 0.50 | 0.60 | 0.25 | 1.00 | 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 | 0.20 | 0.00 | 0.00 | 0.14 | 12.14 |
| C | 0.40 | 0.60 | 0.40 | 1.00 | 1.00 | 1.00 | 0.20 | 0.60 | 0.00 | 0.00 | 0.50 | 0.20 | 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 | 0.33 | 0.22 | 19.28 |
| D | 0.20 | 0.00 | 0.20 | 0.60 | 0.20 | 1.00 | 0.80 | 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 | 0.11 | 9.51 |
| 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 | 0.00 | 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 |
| 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 | 0.00 | 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 |
| H | 0.40 | 0.80 | 0.40 | 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 | 0.05 | 4.76 |
| I | 1.00 | 0.60 | 0.60 | 0.60 | 0.40 | 0.25 | 0.60 | 0.40 | 1.00 | 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 | 0.00 | 0.00 | 0.00 | 0.33 | 0.20 | 17.94 |
| x | 0.00 | 0.00 | 0.00 | 0.40 | 0.80 | 0.25 | 0.80 | 1.00 | 0.20 | 0.75 | 0.50 | 1.20 | 0.75 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 1.00 | 1.00 | 0.67 | 0.54 | 48.51 |
| r | 0.00 | 0.00 | 0.00 | 1.00 | 0.80 | 0.50 | 0.20 | 0.20 | 0.20 | 0.00 | 0.50 | 0.20 | 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 | 0.33 | 0.14 | 12.44 |
| s | 1.20 | 0.60 | 0.40 | 0.40 | 0.40 | 1.00 | 0.60 | 0.60 | 0.80 | 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 | 0.00 | 0.00 | 0.00 | 0.21 | 18.58 |
| a | 0.40 | 0.60 | 0.80 | 0.80 | 0.40 | 0.75 | 0.60 | 0.40 | 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 | 0.17 | 15.11 |
| h | 0.20 | 0.60 | 0.40 | 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 | 0.04 | 3.57 |
| k | 0.20 | 0.20 | 0.00 | 0.00 | 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 | 0.00 | 0.02 | 1.78 |
| x | 1.40 | 1.40 | 1.00 | 0.60 | 0.80 | 0.50 | 1.20 | 1.20 | 1.20 | 1.00 | 0.00 | 0.60 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 0.80 | 1.00 | 1.00 | 0.66 | 59.07 |
| o | 0.60 | 0.40 | 0.60 | 2.00 | 1.60 | 1.75 | 1.20 | 1.00 | 0.00 | 0.00 | 1.00 | 0.80 | 0.50 | 1.00 | 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 | 0.20 | 0.00 | 0.33 | 0.44 | 39.59 |
| i | 0.00 | 0.20 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 1.34 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CV | 33.60 | 42.40 | 28.40 | 21.40 | 15.20 | 32.75 | 28.60 | 13.80 | 9.00 | 3.25 | 3.50 | 2.80 | 2.25 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.33 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 1.20 | 1.00 | 4.67 | 8.41 | 100 |
| CVn | 23.80 | 32.80 | 19.40 | 13.80 | 11.60 | 31.50 | 28.20 | 13.80 | 8.80 | 3.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.33 | 1.00 | 1.00 | 1.00 | 0.00 | 1.00 | 1.20 | 1.00 | 4.67 | 6.67 | 79.38 |
| CVs | 9.80 | 9.60 | 9.00 | 7.60 | 3.60 | 1.25 | 0.40 | 0.00 | 0.20 | 0.00 | 3.50 | 2.80 | 2.25 | 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 | 0.00 | 0.00 | 1.73 | 20.62 |
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