Statistics of sunspot activity
November, 1987
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 | 67.29 | 64.43 | 58.00 | 54.14 | 51.17 | 38.71 | 40.29 | 48.86 | 47.60 | 43.83 | 36.80 | 30.14 | 17.29 | 19.50 | 22.20 | 42.57 | 60.00 | 55.17 | 63.57 | 58.20 | 60.83 | 92.50 | 99.86 | 57.75 | 40.17 | 48.25 | 34.14 | 27.75 | 26.00 | 23.20 | 47.67 | 100 |
| Wn | 33.29 | 31.57 | 28.17 | 25.14 | 20.17 | 19.14 | 16.71 | 21.71 | 23.40 | 29.67 | 19.60 | 11.71 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 8.17 | 7.00 | 0.00 | 0.00 | 5.75 | 1.86 | 0.00 | 11.75 | 11.00 | 10.86 | 22.78 |
| Ws | 34.00 | 32.86 | 29.83 | 29.00 | 31.00 | 19.57 | 23.57 | 27.14 | 24.20 | 14.17 | 17.20 | 18.43 | 17.29 | 19.50 | 22.20 | 42.57 | 60.00 | 55.17 | 63.57 | 58.20 | 60.83 | 84.33 | 92.86 | 57.75 | 40.17 | 42.50 | 32.29 | 27.75 | 14.25 | 12.20 | 36.81 | 77.22 |
| n | 3.43 | 3.57 | 3.33 | 3.43 | 3.50 | 2.86 | 2.86 | 3.71 | 3.60 | 3.67 | 3.00 | 2.14 | 1.00 | 1.00 | 1.00 | 1.86 | 3.00 | 3.17 | 3.14 | 2.20 | 2.17 | 3.83 | 4.14 | 2.50 | 2.50 | 3.25 | 2.43 | 2.25 | 2.00 | 1.80 | 2.74 | 100 |
| A | 0.14 | 0.29 | 0.33 | 0.86 | 1.00 | 0.43 | 1.00 | 1.00 | 1.20 | 2.50 | 1.60 | 0.57 | 0.00 | 0.00 | 0.00 | 0.14 | 0.50 | 0.83 | 0.71 | 0.20 | 0.17 | 0.33 | 0.86 | 0.25 | 0.33 | 0.25 | 0.14 | 0.75 | 0.75 | 0.60 | 0.59 | 21.55 |
| B | 1.00 | 0.57 | 0.33 | 0.00 | 0.33 | 0.86 | 0.86 | 1.29 | 1.20 | 0.33 | 0.80 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.17 | 0.43 | 0.00 | 0.00 | 1.00 | 0.86 | 0.50 | 0.33 | 0.75 | 1.14 | 1.00 | 1.25 | 1.20 | 0.57 | 20.80 |
| C | 1.00 | 0.57 | 0.67 | 0.29 | 0.50 | 0.43 | 1.00 | 0.86 | 1.00 | 0.17 | 0.20 | 0.43 | 0.71 | 0.67 | 0.80 | 0.86 | 0.33 | 1.17 | 0.29 | 0.40 | 0.00 | 0.33 | 0.43 | 0.25 | 0.83 | 1.25 | 0.29 | 0.00 | 0.00 | 0.00 | 0.52 | 19.08 |
| D | 0.00 | 0.57 | 0.83 | 1.00 | 1.00 | 0.71 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 0.14 | 0.33 | 0.20 | 0.29 | 0.50 | 0.83 | 1.57 | 1.40 | 1.50 | 1.17 | 1.00 | 0.25 | 0.17 | 0.50 | 0.29 | 0.00 | 0.00 | 0.00 | 0.49 | 17.83 |
| E | 0.14 | 0.43 | 0.67 | 0.57 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.50 | 1.00 | 0.86 | 0.50 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 6.11 |
| F | 0.00 | 0.14 | 0.00 | 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 | 0.01 | 0.35 |
| G | 0.71 | 0.57 | 0.00 | 0.14 | 0.17 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.75 | 0.67 | 0.50 | 0.57 | 0.25 | 0.00 | 0.00 | 0.17 | 6.06 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.29 | 0.14 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.97 |
| I | 0.43 | 0.43 | 0.50 | 0.43 | 0.50 | 0.43 | 0.00 | 0.43 | 0.20 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.57 | 0.83 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.20 | 7.26 |
| x | 1.14 | 0.86 | 0.67 | 0.86 | 1.33 | 1.29 | 1.86 | 2.29 | 2.40 | 2.83 | 2.40 | 1.00 | 0.00 | 0.00 | 0.00 | 0.14 | 1.00 | 1.00 | 1.14 | 0.20 | 0.17 | 1.33 | 1.71 | 0.75 | 0.67 | 1.00 | 1.29 | 1.75 | 2.00 | 1.80 | 1.16 | 42.35 |
| r | 0.00 | 0.00 | 0.00 | 0.29 | 0.00 | 0.14 | 0.00 | 0.14 | 0.00 | 0.33 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.29 | 0.00 | 0.00 | 0.50 | 0.14 | 0.00 | 0.00 | 0.00 | 0.08 | 2.78 |
| s | 1.00 | 1.29 | 1.33 | 0.86 | 1.50 | 1.14 | 1.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.57 | 0.50 | 1.00 | 0.29 | 0.60 | 0.00 | 0.50 | 0.43 | 0.25 | 0.33 | 1.50 | 0.57 | 0.50 | 0.00 | 0.00 | 0.59 | 21.45 |
| a | 0.57 | 1.29 | 1.33 | 1.00 | 0.67 | 0.29 | 0.00 | 0.29 | 0.20 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.67 | 1.00 | 1.00 | 1.17 | 1.33 | 1.14 | 1.25 | 1.50 | 0.25 | 0.43 | 0.00 | 0.00 | 0.00 | 0.53 | 19.31 |
| h | 0.43 | 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 | 0.00 | 0.00 | 0.17 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 1.14 |
| k | 0.29 | 0.14 | 0.00 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.50 | 0.57 | 0.40 | 0.83 | 0.50 | 0.57 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.36 | 12.97 |
| x | 0.57 | 0.71 | 0.83 | 1.29 | 1.50 | 0.86 | 1.00 | 1.43 | 1.40 | 3.17 | 1.80 | 0.86 | 0.14 | 0.00 | 0.00 | 0.71 | 1.50 | 1.00 | 0.86 | 0.20 | 0.17 | 0.33 | 0.86 | 0.25 | 0.33 | 0.25 | 0.14 | 1.00 | 0.75 | 0.60 | 0.82 | 29.77 |
| o | 2.57 | 2.14 | 1.67 | 1.00 | 1.83 | 2.00 | 1.86 | 2.29 | 2.20 | 0.50 | 1.20 | 1.29 | 0.86 | 1.00 | 1.00 | 1.00 | 1.33 | 1.67 | 0.86 | 0.80 | 0.83 | 2.50 | 2.14 | 1.50 | 2.00 | 3.00 | 2.29 | 1.25 | 1.25 | 1.20 | 1.57 | 57.10 |
| i | 0.29 | 0.71 | 0.83 | 1.14 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.17 | 0.33 | 1.14 | 1.20 | 1.17 | 0.83 | 1.00 | 0.75 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 12.20 |
| 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 | 0.17 | 0.29 | 0.00 | 0.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.93 |
| CV | 55.86 | 54.14 | 47.50 | 60.43 | 39.00 | 27.29 | 13.71 | 19.29 | 16.00 | 9.67 | 22.20 | 42.00 | 38.57 | 39.67 | 39.00 | 46.43 | 57.50 | 46.67 | 61.43 | 51.40 | 62.17 | 65.67 | 65.29 | 43.75 | 29.00 | 36.50 | 24.57 | 11.75 | 3.25 | 3.00 | 37.76 | 100 |
| CVn | 31.86 | 27.29 | 23.17 | 30.57 | 13.17 | 6.43 | 1.86 | 4.86 | 4.00 | 2.83 | 2.40 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.17 | 0.86 | 0.00 | 0.00 | 0.75 | 0.29 | 0.00 | 1.50 | 1.60 | 5.22 | 13.82 |
| CVs | 24.00 | 26.86 | 24.33 | 29.86 | 25.83 | 20.86 | 11.86 | 14.43 | 12.00 | 6.83 | 19.80 | 40.00 | 38.57 | 39.67 | 39.00 | 46.43 | 57.50 | 46.67 | 61.43 | 51.40 | 62.17 | 64.50 | 64.43 | 43.75 | 29.00 | 35.75 | 24.29 | 11.75 | 1.75 | 1.40 | 32.54 | 86.18 |
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