Statistics of sunspot activity
April, 2008
Visual indices of solar activity by author's observations
| Date | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | Average | % |
| W | 29 | 14 |   | 12 | 11 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 13 |   |   |   | 0 |   |   | 0 | 6.08 | 100 |
| Wn | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 13 |   |   |   | 0 |   |   | 0 | 1.00 | 83.54 |
| Ws | 29 | 14 |   | 12 | 11 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 5.08 | 16.46 |
| n | 2 | 1 |   | 1 | 1 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.46 | 100 |
| A | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| B | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| C | 2 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.23 | 50.00 |
| D | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| E | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| F | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| G | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| H | 0 | 1 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.08 | 16.67 |
| I | 0 | 0 |   | 1 | 1 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.15 | 33.33 |
| x | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| r | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.08 | 16.67 |
| s | 0 | 0 |   | 1 | 1 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.15 | 33.33 |
| a | 2 | 1 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.23 | 50.00 |
| h | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| k | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| x | 0 | 1 |   | 1 | 1 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.23 | 50.00 |
| o | 2 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.23 | 50.00 |
| i | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| c | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| CV | 16 | 7 |   | 10 | 10 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 5 |   |   |   | 0 |   |   | 0 | 3.69 | 100 |
| CVn | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 5 |   |   |   | 0 |   |   | 0 | 0.38 | 10.42 |
| CVs | 16 | 7 |   | 10 | 10 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 3.31 | 89.58 |
| gr | 2 | 1 |   | 1 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.38 | 83.33 |
| grfp | 5 | 4 |   | 1 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 1 |   |   |   | 0 |   |   | 0 | 0.85 | 61.11 |
| grf | 4 | 0 |   | 1 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 2 |   |   |   | 0 |   |   | 0 | 0.54 | 38.89 |
| efp | 0 | 0 |   | 0 | 1 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.08 | 16.67 |
| ef | 0 | 0 |   | 0 | 0 | 0 | 0 | 0 |   |   |   |   |   | 0 |   |   |   | 0 |   | 0 |   |   | 0 |   |   |   | 0 |   |   | 0 | 0.00 | 0.00 |
| Cond | 3 | 2 |   | 2 | 2 | 2 | 2 | 2 |   |   |   |   |   | 2 |   |   |   | 2 |   | 2 |   |   | 2 |   |   |   | 3 |   |   | 3 | 2.23 | 55.38 |
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