Statistics of sunspot activity
February, 1983
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 | Average | % |
| W | 144.60 | 129.00 | 146.75 | 150.50 | 121.60 | 124.00 | 84.40 | 95.00 | 69.20 | 34.00 | 30.60 | 29.33 | 17.33 | 14.33 | 29.83 | 30.00 | 35.20 | 51.75 | 44.75 | 45.60 | 58.20 | 46.00 | 59.80 | 84.20 | 90.50 | 105.60 | 130.80 | 142.60 | 76.62 | 100 |
| Wn | 36.20 | 23.80 | 17.25 | 12.00 | 4.60 | 5.67 | 2.20 | 0.00 | 10.40 | 12.75 | 12.60 | 16.17 | 15.50 | 14.33 | 19.83 | 8.50 | 0.00 | 0.00 | 0.00 | 6.60 | 14.80 | 20.50 | 32.00 | 39.00 | 41.75 | 46.20 | 34.60 | 29.20 | 17.02 | 22.21 |
| Ws | 108.40 | 105.20 | 129.50 | 138.50 | 117.00 | 118.33 | 82.20 | 95.00 | 58.80 | 21.25 | 18.00 | 13.17 | 1.83 | 0.00 | 10.00 | 21.50 | 35.20 | 51.75 | 44.75 | 39.00 | 43.40 | 25.50 | 27.80 | 45.20 | 48.75 | 59.40 | 96.20 | 113.40 | 59.61 | 77.79 |
| n | 7.40 | 6.60 | 7.50 | 6.75 | 5.20 | 5.17 | 4.40 | 5.75 | 4.80 | 2.00 | 2.00 | 2.17 | 1.17 | 1.00 | 2.50 | 2.50 | 2.80 | 3.50 | 3.25 | 3.60 | 4.80 | 3.75 | 4.60 | 5.80 | 6.50 | 7.60 | 8.80 | 9.80 | 4.70 | 100 |
| A | 1.20 | 0.40 | 1.25 | 0.50 | 0.80 | 1.00 | 0.60 | 2.75 | 1.40 | 0.00 | 0.20 | 0.00 | 0.00 | 0.50 | 1.17 | 1.75 | 0.20 | 0.25 | 0.25 | 0.40 | 1.60 | 1.00 | 0.60 | 0.60 | 0.50 | 0.80 | 0.40 | 0.80 | 0.75 | 15.88 |
| B | 1.20 | 0.80 | 1.25 | 0.75 | 1.20 | 1.33 | 1.20 | 0.25 | 1.00 | 0.00 | 0.40 | 0.83 | 0.50 | 0.17 | 1.17 | 0.25 | 0.40 | 0.25 | 0.50 | 0.60 | 0.20 | 0.25 | 0.20 | 0.20 | 0.75 | 0.40 | 1.40 | 1.60 | 0.68 | 14.46 |
| C | 1.00 | 1.60 | 1.25 | 1.25 | 0.40 | 0.50 | 0.60 | 0.50 | 0.80 | 0.75 | 0.20 | 0.67 | 0.50 | 0.33 | 0.00 | 0.00 | 0.40 | 0.50 | 0.25 | 0.40 | 0.00 | 0.50 | 1.00 | 1.00 | 2.00 | 2.00 | 1.60 | 4.00 | 0.86 | 18.22 |
| D | 1.20 | 1.20 | 1.25 | 2.75 | 2.20 | 1.50 | 1.20 | 1.25 | 0.20 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.50 | 0.25 | 0.00 | 0.80 | 0.75 | 1.00 | 1.40 | 0.75 | 1.20 | 2.40 | 1.40 | 0.84 | 17.96 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 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 | 0.00 | 0.00 | 0.03 | 0.66 |
| F | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.15 |
| G | 1.80 | 0.40 | 0.50 | 0.00 | 0.00 | 0.17 | 0.60 | 1.00 | 1.00 | 0.75 | 1.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 0.50 | 0.40 | 0.20 | 0.20 | 0.34 | 7.33 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.20 | 0.40 | 0.75 | 1.00 | 1.20 | 0.60 | 0.18 | 3.77 |
| I | 1.00 | 2.00 | 2.00 | 1.50 | 0.60 | 0.00 | 0.00 | 0.00 | 0.20 | 0.25 | 0.20 | 0.17 | 0.17 | 0.00 | 0.17 | 0.50 | 1.60 | 1.75 | 2.00 | 2.20 | 2.00 | 1.25 | 1.60 | 1.40 | 1.25 | 1.80 | 1.60 | 1.20 | 1.01 | 21.56 |
| x | 2.40 | 1.20 | 2.50 | 1.25 | 2.00 | 2.33 | 1.80 | 3.00 | 2.40 | 0.00 | 0.60 | 0.83 | 0.50 | 0.67 | 2.33 | 2.00 | 0.60 | 0.50 | 0.75 | 1.00 | 1.80 | 1.25 | 0.80 | 0.80 | 1.25 | 1.20 | 1.80 | 2.40 | 1.43 | 30.35 |
| r | 0.20 | 0.80 | 1.00 | 1.75 | 0.00 | 0.17 | 0.40 | 0.50 | 0.40 | 0.00 | 0.20 | 0.17 | 0.50 | 0.17 | 0.00 | 0.00 | 0.20 | 0.25 | 0.25 | 0.40 | 0.00 | 0.00 | 0.20 | 0.20 | 1.25 | 1.00 | 0.80 | 1.20 | 0.43 | 9.11 |
| s | 3.60 | 2.80 | 2.00 | 2.00 | 0.80 | 0.17 | 0.40 | 0.00 | 0.60 | 1.50 | 0.60 | 0.50 | 0.00 | 0.00 | 0.00 | 0.50 | 1.40 | 1.75 | 1.75 | 1.80 | 1.80 | 1.50 | 2.40 | 2.20 | 2.25 | 2.80 | 3.20 | 3.80 | 1.50 | 31.98 |
| a | 0.40 | 0.80 | 1.00 | 0.50 | 0.80 | 0.33 | 0.00 | 0.50 | 0.20 | 0.25 | 0.20 | 0.33 | 0.17 | 0.17 | 0.17 | 0.00 | 0.60 | 0.50 | 0.50 | 0.40 | 1.00 | 1.00 | 0.60 | 2.20 | 0.75 | 1.00 | 1.00 | 0.80 | 0.58 | 12.28 |
| h | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.40 | 0.25 | 0.40 | 0.00 | 0.20 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 1.00 | 1.00 | 1.20 | 1.00 | 0.23 | 4.95 |
| k | 0.80 | 1.00 | 0.75 | 1.25 | 1.60 | 2.17 | 1.40 | 1.50 | 0.80 | 0.25 | 0.20 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.60 | 0.00 | 0.00 | 0.60 | 0.80 | 0.60 | 0.53 | 11.34 |
| x | 2.20 | 2.40 | 3.25 | 2.00 | 1.40 | 1.00 | 0.60 | 2.75 | 1.80 | 0.25 | 0.40 | 0.33 | 0.17 | 0.50 | 1.33 | 2.25 | 1.80 | 2.25 | 2.25 | 2.60 | 3.80 | 2.25 | 2.40 | 2.40 | 2.50 | 3.60 | 3.20 | 2.60 | 1.94 | 41.22 |
| o | 4.40 | 3.00 | 3.25 | 2.75 | 2.40 | 2.17 | 3.20 | 3.00 | 3.00 | 1.75 | 1.60 | 1.83 | 1.00 | 0.50 | 1.17 | 0.25 | 1.00 | 1.25 | 1.00 | 1.00 | 1.00 | 1.50 | 2.20 | 3.00 | 3.75 | 3.80 | 5.60 | 6.80 | 2.40 | 51.00 |
| i | 0.40 | 0.80 | 0.25 | 1.25 | 1.20 | 2.00 | 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 | 0.00 | 0.00 | 0.00 | 0.40 | 0.25 | 0.20 | 0.00 | 0.40 | 0.28 | 5.88 |
| c | 0.40 | 0.40 | 0.75 | 0.75 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 1.90 |
| CV | 117.00 | 103.00 | 100.25 | 116.25 | 100.40 | 110.83 | 94.60 | 92.25 | 70.00 | 39.50 | 36.00 | 27.00 | 4.67 | 3.00 | 4.67 | 7.25 | 22.80 | 49.25 | 26.50 | 24.40 | 44.60 | 33.00 | 67.60 | 86.20 | 92.50 | 125.20 | 154.80 | 139.40 | 67.60 | 100 |
| CVn | 32.00 | 18.40 | 14.25 | 10.00 | 3.40 | 0.50 | 0.20 | 0.00 | 2.80 | 10.75 | 5.20 | 3.67 | 4.00 | 3.00 | 3.17 | 0.75 | 0.00 | 0.00 | 0.00 | 1.20 | 16.60 | 17.00 | 38.40 | 33.80 | 39.50 | 48.40 | 38.20 | 26.20 | 13.26 | 19.62 |
| CVs | 85.00 | 84.60 | 86.00 | 106.25 | 97.00 | 110.33 | 94.40 | 92.25 | 67.20 | 28.75 | 30.80 | 23.33 | 0.67 | 0.00 | 1.50 | 6.50 | 22.80 | 49.25 | 26.50 | 23.20 | 28.00 | 16.00 | 29.20 | 52.40 | 53.00 | 76.80 | 116.60 | 113.20 | 54.34 | 80.38 |
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