Statistics of sunspot activity
April, 1985
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 | 26.75 | 22.17 | 27.00 | 21.50 | 24.00 | 24.00 | 19.50 | 12.00 | 13.00 | 0.00 | 0.00 | 0.00 | 11.00 | 11.00 | 0.00 | 0.00 | 0.00 | 12.75 | 14.00 | 16.75 | 21.00 | 42.17 | 41.33 | 45.00 | 33.64 | 26.92 | 41.25 | 33.80 | 34.67 | 28.67 | 20.13 | 100 |
| Wn | 15.25 | 12.17 | 12.14 | 2.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 9.75 | 21.00 | 42.17 | 41.33 | 40.40 | 29.93 | 25.15 | 41.25 | 33.80 | 34.67 | 28.67 | 13.38 | 66.48 |
| Ws | 11.50 | 10.00 | 14.86 | 18.75 | 24.00 | 24.00 | 19.50 | 12.00 | 13.00 | 0.00 | 0.00 | 0.00 | 11.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.75 | 14.00 | 7.00 | 0.00 | 0.00 | 0.00 | 4.60 | 3.71 | 1.77 | 0.00 | 0.00 | 0.00 | 0.00 | 6.75 | 33.52 |
| n | 2.25 | 1.83 | 2.14 | 1.50 | 1.60 | 1.60 | 1.50 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 1.25 | 1.00 | 1.33 | 1.00 | 1.40 | 1.64 | 1.31 | 1.00 | 1.00 | 1.00 | 1.00 | 1.05 | 100 |
| A | 0.25 | 0.17 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.29 | 0.23 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 16.21 |
| B | 0.75 | 0.00 | 0.71 | 0.75 | 1.00 | 0.80 | 1.25 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 1.00 | 0.75 | 0.20 | 0.17 | 0.00 | 0.00 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.31 | 30.03 |
| C | 0.25 | 0.50 | 0.86 | 0.50 | 0.40 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.20 | 0.17 | 0.00 | 0.00 | 0.43 | 0.62 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 16.64 |
| D | 0.75 | 0.67 | 0.43 | 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 | 0.60 | 1.00 | 0.17 | 0.00 | 0.21 | 0.23 | 0.00 | 0.20 | 0.00 | 0.67 | 0.17 | 16.34 |
| 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 | 0.83 | 0.80 | 0.36 | 0.23 | 1.00 | 0.60 | 1.00 | 0.33 | 0.17 | 16.44 |
| 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 | 0.20 | 0.07 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.02 | 1.50 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| I | 0.25 | 0.50 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 2.85 |
| x | 1.00 | 0.17 | 0.71 | 1.00 | 1.00 | 0.80 | 1.50 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.75 | 0.20 | 0.17 | 0.00 | 0.40 | 0.57 | 0.23 | 0.00 | 0.00 | 0.00 | 0.00 | 0.48 | 46.24 |
| r | 0.25 | 0.17 | 0.43 | 0.50 | 0.40 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.60 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 11.21 |
| s | 0.75 | 1.00 | 0.86 | 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 | 0.20 | 0.17 | 0.00 | 0.00 | 0.29 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 12.26 |
| a | 0.25 | 0.50 | 0.14 | 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 | 0.07 | 0.08 | 0.00 | 0.00 | 0.00 | 0.17 | 0.05 | 4.49 |
| 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 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 |
| 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 | 1.00 | 1.00 | 1.00 | 0.64 | 0.54 | 1.00 | 1.00 | 1.00 | 0.83 | 0.27 | 25.56 |
| x | 0.50 | 0.67 | 0.14 | 0.25 | 0.00 | 0.00 | 0.25 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.29 | 0.23 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 19.06 |
| o | 1.75 | 1.17 | 2.00 | 1.25 | 1.60 | 1.40 | 1.25 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 1.00 | 1.25 | 0.60 | 0.67 | 0.00 | 0.20 | 0.93 | 0.85 | 0.00 | 0.20 | 0.00 | 0.00 | 0.60 | 56.95 |
| i | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.67 | 1.00 | 0.80 | 0.43 | 0.23 | 1.00 | 0.80 | 1.00 | 0.83 | 0.25 | 23.47 |
| 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 | 0.17 | 0.01 | 0.53 |
| CV | 22.75 | 22.83 | 19.14 | 4.25 | 7.80 | 7.00 | 2.75 | 1.50 | 1.50 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.75 | 2.00 | 4.00 | 11.60 | 47.17 | 46.83 | 46.80 | 34.29 | 31.92 | 47.00 | 46.20 | 47.00 | 43.83 | 16.73 | 100 |
| CVn | 20.50 | 13.17 | 13.57 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.00 | 11.60 | 47.17 | 46.83 | 46.40 | 33.86 | 31.77 | 47.00 | 46.20 | 47.00 | 43.83 | 15.10 | 90.28 |
| CVs | 2.25 | 9.67 | 5.57 | 4.00 | 7.80 | 7.00 | 2.75 | 1.50 | 1.50 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.75 | 2.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.43 | 0.15 | 0.00 | 0.00 | 0.00 | 0.00 | 1.63 | 9.72 |
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