Statistics of sunspot activity
February, 1988
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 | Average | % |
| W | 65.50 | 71.60 | 67.20 | 76.33 | 59.25 | 44.25 | 51.20 | 54.57 | 47.71 | 41.20 | 29.00 | 16.00 | 25.80 | 27.67 | 25.43 | 32.86 | 37.14 | 43.29 | 80.83 | 54.67 | 28.83 | 15.20 | 12.60 | 20.33 | 23.60 | 23.00 | 36.33 | 51.75 | 49.20 | 41.81 | 100 |
| Wn | 57.00 | 62.20 | 55.80 | 58.00 | 53.75 | 41.50 | 51.20 | 53.00 | 40.71 | 29.00 | 17.17 | 3.43 | 11.00 | 12.83 | 13.43 | 19.57 | 22.86 | 16.71 | 42.50 | 24.17 | 20.33 | 12.80 | 12.60 | 11.17 | 12.20 | 19.33 | 34.33 | 39.50 | 24.80 | 30.10 | 72.00 |
| Ws | 8.50 | 9.40 | 11.40 | 18.33 | 5.50 | 2.75 | 0.00 | 1.57 | 7.00 | 12.20 | 11.83 | 12.57 | 14.80 | 14.83 | 12.00 | 13.29 | 14.29 | 26.57 | 38.33 | 30.50 | 8.50 | 2.40 | 0.00 | 9.17 | 11.40 | 3.67 | 2.00 | 12.25 | 24.40 | 11.71 | 28.00 |
| n | 4.50 | 5.00 | 5.00 | 6.00 | 4.50 | 3.25 | 3.80 | 4.14 | 3.86 | 3.20 | 2.50 | 1.43 | 2.20 | 2.17 | 2.00 | 2.43 | 2.43 | 2.71 | 4.33 | 3.67 | 2.00 | 1.20 | 1.00 | 1.83 | 2.00 | 2.00 | 2.83 | 3.75 | 2.80 | 3.05 | 100 |
| A | 1.25 | 0.80 | 0.80 | 2.00 | 0.75 | 0.25 | 0.20 | 1.14 | 0.71 | 1.00 | 1.17 | 1.00 | 0.80 | 0.17 | 0.00 | 0.29 | 0.14 | 0.14 | 1.33 | 1.00 | 0.67 | 0.20 | 0.00 | 0.83 | 0.60 | 1.33 | 0.50 | 1.25 | 1.00 | 0.74 | 24.09 |
| B | 0.25 | 0.40 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.71 | 0.86 | 0.60 | 0.50 | 0.14 | 0.40 | 0.67 | 0.57 | 0.57 | 0.71 | 0.71 | 0.67 | 0.83 | 0.33 | 0.00 | 0.00 | 0.00 | 0.40 | 0.67 | 2.33 | 1.75 | 0.20 | 0.50 | 16.36 |
| C | 0.75 | 2.20 | 1.80 | 1.67 | 2.75 | 1.25 | 1.60 | 0.57 | 0.86 | 0.60 | 0.33 | 0.00 | 0.00 | 0.50 | 0.29 | 0.43 | 0.29 | 0.57 | 0.33 | 0.67 | 0.17 | 0.40 | 0.40 | 0.17 | 0.60 | 0.00 | 0.00 | 0.25 | 0.00 | 0.67 | 21.95 |
| D | 1.25 | 1.60 | 1.40 | 1.00 | 0.25 | 0.00 | 0.20 | 0.14 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.14 | 0.29 | 0.29 | 1.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.60 | 0.35 | 11.42 |
| 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 |
| 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 |
| 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 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.67 | 0.67 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 8.13 |
| 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 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.60 | 0.40 | 0.83 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.11 | 3.61 |
| I | 1.00 | 0.00 | 0.80 | 1.33 | 0.75 | 1.75 | 1.80 | 1.57 | 1.29 | 1.00 | 0.50 | 0.29 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.44 | 14.43 |
| x | 1.50 | 1.20 | 1.00 | 2.00 | 0.75 | 0.25 | 0.20 | 1.86 | 1.57 | 1.60 | 1.67 | 1.14 | 1.20 | 0.83 | 0.57 | 0.86 | 0.86 | 0.86 | 2.00 | 1.83 | 1.00 | 0.20 | 0.00 | 0.83 | 1.00 | 2.00 | 2.83 | 3.00 | 1.20 | 1.23 | 40.45 |
| r | 0.00 | 0.20 | 0.00 | 0.00 | 0.25 | 0.25 | 0.60 | 0.14 | 0.43 | 0.40 | 0.33 | 0.14 | 0.00 | 0.00 | 0.14 | 0.57 | 0.57 | 0.86 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.19 | 6.35 |
| s | 2.25 | 2.20 | 3.20 | 3.00 | 3.00 | 2.25 | 2.40 | 1.86 | 1.57 | 1.20 | 0.50 | 0.14 | 0.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.67 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.25 | 0.40 | 0.90 | 29.44 |
| a | 0.75 | 1.40 | 0.80 | 1.00 | 0.50 | 0.50 | 0.60 | 0.29 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.14 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.80 | 0.29 | 9.65 |
| 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 | 0.60 | 0.67 | 0.71 | 0.43 | 0.57 | 0.86 | 0.67 | 0.33 | 0.33 | 1.00 | 1.00 | 1.00 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.30 | 9.91 |
| 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 | 0.40 | 0.33 | 0.29 | 0.57 | 0.43 | 0.00 | 0.33 | 0.50 | 0.67 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 4.20 |
| x | 2.25 | 0.80 | 1.60 | 3.33 | 1.50 | 2.00 | 2.00 | 2.71 | 2.00 | 2.00 | 1.67 | 1.29 | 1.80 | 0.33 | 0.00 | 0.29 | 0.14 | 0.14 | 1.33 | 1.33 | 0.83 | 0.80 | 0.40 | 1.67 | 1.00 | 1.33 | 0.50 | 1.25 | 1.00 | 1.29 | 42.14 |
| o | 2.25 | 4.20 | 3.40 | 2.00 | 3.00 | 1.25 | 1.80 | 1.29 | 1.86 | 1.20 | 0.83 | 0.14 | 0.40 | 1.83 | 2.00 | 2.14 | 2.29 | 2.14 | 2.67 | 2.33 | 1.17 | 0.40 | 0.60 | 0.17 | 1.00 | 0.67 | 2.33 | 2.25 | 1.00 | 1.68 | 54.90 |
| i | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.80 | 0.09 | 2.96 |
| 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 |
| CV | 47.50 | 58.60 | 60.40 | 55.67 | 41.00 | 28.50 | 34.20 | 26.14 | 24.86 | 16.40 | 8.83 | 3.29 | 40.40 | 50.67 | 55.43 | 53.00 | 55.14 | 55.43 | 77.00 | 51.83 | 44.33 | 40.60 | 42.40 | 41.00 | 35.40 | 2.67 | 5.17 | 18.00 | 34.20 | 38.21 | 100 |
| CVn | 46.50 | 57.80 | 59.20 | 54.00 | 40.50 | 28.25 | 34.20 | 26.00 | 23.71 | 12.40 | 5.00 | 0.43 | 38.80 | 46.17 | 49.29 | 48.14 | 49.00 | 44.14 | 49.83 | 38.67 | 43.33 | 40.40 | 42.40 | 40.17 | 34.00 | 2.33 | 5.00 | 16.75 | 17.80 | 34.28 | 89.73 |
| CVs | 1.00 | 0.80 | 1.20 | 1.67 | 0.50 | 0.25 | 0.00 | 0.14 | 1.14 | 4.00 | 3.83 | 2.86 | 1.60 | 4.50 | 6.14 | 4.86 | 6.14 | 11.29 | 27.17 | 13.17 | 1.00 | 0.20 | 0.00 | 0.83 | 1.40 | 0.33 | 0.17 | 1.25 | 16.40 | 3.93 | 10.27 |
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