Statistics of sunspot activity
January, 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 | 30 | 31 | Average | % |
| W | 44.00 | 36.57 | 26.00 | 26.83 | 40.33 | 50.50 | 61.29 | 61.67 | 72.00 | 72.67 | 57.25 | 75.67 | 71.83 | 105.17 | 108.00 | 88.00 | 65.60 | 73.40 | 65.25 | 74.40 | 69.80 | 64.40 | 55.40 | 47.50 | 34.40 | 51.50 | 61.00 | 68.17 | 68.83 | 62.60 | 49.43 | 61.60 | 100 |
| Wn | 0.00 | 0.00 | 0.00 | 9.33 | 15.00 | 16.75 | 23.29 | 24.67 | 30.80 | 35.33 | 34.00 | 38.00 | 33.50 | 47.83 | 33.75 | 18.75 | 5.20 | 5.00 | 0.00 | 2.40 | 0.00 | 0.00 | 0.00 | 1.83 | 0.00 | 12.00 | 23.60 | 33.83 | 43.00 | 40.00 | 41.00 | 18.35 | 29.79 |
| Ws | 44.00 | 36.57 | 26.00 | 17.50 | 25.33 | 33.75 | 38.00 | 37.00 | 41.20 | 37.33 | 23.25 | 37.67 | 38.33 | 57.33 | 74.25 | 69.25 | 60.40 | 68.40 | 65.25 | 72.00 | 69.80 | 64.40 | 55.40 | 45.67 | 34.40 | 39.50 | 37.40 | 34.33 | 25.83 | 22.60 | 8.43 | 43.24 | 70.21 |
| n | 2.75 | 2.14 | 1.86 | 2.17 | 3.00 | 3.50 | 3.71 | 3.00 | 4.40 | 4.33 | 3.50 | 5.00 | 5.00 | 6.33 | 5.75 | 4.75 | 2.80 | 3.80 | 3.00 | 3.80 | 3.60 | 3.40 | 3.20 | 3.50 | 2.60 | 3.83 | 3.80 | 4.33 | 5.17 | 5.00 | 3.29 | 3.75 | 100 |
| A | 1.50 | 1.14 | 0.86 | 1.17 | 0.67 | 0.25 | 0.29 | 0.00 | 0.40 | 0.33 | 0.00 | 1.00 | 0.50 | 0.50 | 0.75 | 0.25 | 0.00 | 0.80 | 0.00 | 0.40 | 0.20 | 0.40 | 0.40 | 1.17 | 0.20 | 0.50 | 0.40 | 0.67 | 1.17 | 1.40 | 0.29 | 0.57 | 15.12 |
| B | 0.00 | 0.00 | 0.00 | 0.00 | 1.33 | 1.75 | 1.14 | 0.33 | 1.00 | 1.00 | 1.00 | 1.00 | 0.83 | 1.17 | 2.75 | 1.25 | 0.60 | 1.00 | 0.25 | 0.40 | 1.00 | 0.60 | 0.80 | 0.33 | 0.40 | 1.50 | 0.40 | 1.33 | 1.33 | 1.00 | 0.43 | 0.84 | 22.30 |
| C | 0.00 | 0.86 | 0.29 | 0.17 | 0.00 | 0.75 | 1.57 | 0.67 | 1.80 | 1.67 | 1.50 | 0.67 | 1.33 | 3.17 | 1.00 | 1.50 | 0.60 | 0.60 | 0.50 | 0.40 | 0.20 | 0.80 | 0.80 | 1.50 | 0.60 | 0.67 | 0.60 | 0.50 | 0.33 | 1.00 | 0.43 | 0.85 | 22.75 |
| D | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.29 | 1.67 | 1.00 | 1.17 | 0.50 | 1.00 | 0.67 | 0.67 | 0.25 | 0.50 | 0.20 | 0.00 | 0.75 | 1.00 | 1.00 | 0.40 | 0.20 | 0.00 | 0.00 | 0.33 | 1.40 | 0.33 | 1.50 | 0.80 | 1.29 | 0.55 | 14.53 |
| E | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.50 | 0.17 | 0.17 | 0.75 | 1.00 | 1.00 | 0.40 | 0.75 | 0.40 | 0.40 | 0.40 | 0.80 | 0.17 | 0.20 | 0.00 | 0.20 | 0.67 | 0.00 | 0.00 | 0.00 | 0.27 | 7.21 |
| 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 | 0.20 | 0.40 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.87 |
| G | 0.75 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.20 | 0.17 | 0.25 | 0.33 | 0.17 | 0.17 | 0.25 | 0.00 | 0.20 | 0.60 | 0.50 | 1.20 | 0.80 | 0.80 | 0.20 | 0.00 | 0.20 | 0.00 | 0.00 | 0.17 | 0.17 | 0.00 | 0.00 | 0.24 | 6.38 |
| H | 0.00 | 0.00 | 0.43 | 0.17 | 0.00 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.80 |
| I | 0.25 | 0.00 | 0.29 | 0.67 | 1.00 | 0.75 | 0.43 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 1.00 | 0.50 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 1.00 | 0.83 | 0.80 | 0.67 | 0.67 | 0.80 | 0.86 | 0.38 | 10.03 |
| x | 1.50 | 1.14 | 0.86 | 1.17 | 2.00 | 2.00 | 1.43 | 0.33 | 1.40 | 1.33 | 1.00 | 2.00 | 1.33 | 1.67 | 3.50 | 1.50 | 0.60 | 1.80 | 0.25 | 0.80 | 1.20 | 1.00 | 1.20 | 1.50 | 0.60 | 2.00 | 0.80 | 2.00 | 2.50 | 2.40 | 0.71 | 1.40 | 37.42 |
| r | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.86 | 0.17 | 0.40 | 0.50 | 1.00 | 0.50 | 0.83 | 1.33 | 0.25 | 0.50 | 0.20 | 0.00 | 0.00 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.60 | 0.33 | 0.17 | 0.40 | 0.43 | 0.32 | 8.66 |
| s | 0.25 | 0.00 | 0.29 | 0.67 | 1.00 | 0.75 | 1.00 | 1.17 | 1.40 | 1.17 | 0.75 | 1.17 | 2.17 | 2.33 | 0.00 | 1.00 | 0.40 | 0.20 | 1.25 | 1.00 | 1.40 | 1.20 | 0.80 | 1.33 | 1.20 | 1.17 | 1.40 | 0.83 | 1.00 | 1.80 | 1.71 | 1.03 | 27.34 |
| a | 0.00 | 0.14 | 0.00 | 0.17 | 0.00 | 0.25 | 0.43 | 1.33 | 1.20 | 1.33 | 0.75 | 1.33 | 0.33 | 0.33 | 1.00 | 0.75 | 1.40 | 1.00 | 0.75 | 0.60 | 0.00 | 0.20 | 0.40 | 0.00 | 0.60 | 0.17 | 1.00 | 1.17 | 1.50 | 0.40 | 0.43 | 0.61 | 16.31 |
| h | 0.50 | 0.57 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.40 | 0.60 | 0.20 | 0.40 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 3.83 |
| k | 0.50 | 0.29 | 0.43 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.75 | 0.20 | 0.80 | 0.50 | 0.40 | 0.40 | 0.80 | 0.40 | 0.33 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 6.45 |
| x | 1.75 | 1.14 | 1.57 | 2.00 | 1.67 | 1.00 | 0.71 | 0.00 | 0.40 | 0.33 | 0.25 | 1.50 | 1.83 | 1.00 | 0.75 | 0.50 | 0.00 | 0.80 | 0.00 | 0.40 | 0.20 | 0.40 | 0.40 | 1.33 | 1.20 | 1.33 | 1.20 | 1.33 | 1.83 | 2.20 | 1.14 | 0.97 | 25.95 |
| o | 0.75 | 0.86 | 0.29 | 0.17 | 1.00 | 2.25 | 2.29 | 2.17 | 3.40 | 3.83 | 3.00 | 2.83 | 2.67 | 4.33 | 3.50 | 2.50 | 1.40 | 2.00 | 1.75 | 2.60 | 2.20 | 2.00 | 2.00 | 1.67 | 1.00 | 2.50 | 1.60 | 2.33 | 3.33 | 2.80 | 2.14 | 2.17 | 57.73 |
| i | 0.25 | 0.14 | 0.00 | 0.00 | 0.33 | 0.25 | 0.71 | 0.83 | 0.60 | 0.17 | 0.25 | 0.67 | 0.50 | 1.00 | 1.50 | 1.75 | 1.40 | 1.00 | 1.25 | 0.80 | 1.20 | 1.00 | 0.80 | 0.50 | 0.40 | 0.00 | 1.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.61 | 16.31 |
| 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 | 0.00 |
| CV | 52.00 | 38.00 | 31.29 | 15.33 | 13.67 | 16.00 | 25.57 | 52.67 | 45.20 | 44.83 | 28.75 | 54.00 | 60.67 | 77.33 | 65.75 | 79.50 | 49.60 | 61.00 | 80.25 | 83.60 | 86.00 | 72.00 | 59.20 | 47.50 | 30.60 | 23.00 | 48.00 | 38.67 | 46.50 | 38.20 | 38.86 | 48.50 | 100 |
| CVn | 0.00 | 0.00 | 0.00 | 0.83 | 2.33 | 3.00 | 5.00 | 13.00 | 9.80 | 12.50 | 18.00 | 43.67 | 31.67 | 19.83 | 4.25 | 4.75 | 0.80 | 0.60 | 0.00 | 0.40 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 2.67 | 20.80 | 28.00 | 39.33 | 34.00 | 37.71 | 10.75 | 22.16 |
| CVs | 52.00 | 38.00 | 31.29 | 14.50 | 11.33 | 13.00 | 20.57 | 39.67 | 35.40 | 32.33 | 10.75 | 10.33 | 29.00 | 57.50 | 61.50 | 74.75 | 48.80 | 60.40 | 80.25 | 83.20 | 86.00 | 72.00 | 59.20 | 47.33 | 30.60 | 20.33 | 27.20 | 10.67 | 7.17 | 4.20 | 1.14 | 37.76 | 77.84 |
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