Statistics of sunspot activity
September, 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 | 29 | 30 | Average | % |
| W | 57.83 | 68.43 | 71.43 | 88.33 | 100.50 | 88.20 | 97.67 | 91.33 | 94.17 | 97.75 | 80.40 | 63.00 | 47.57 | 42.25 | 57.33 | 46.63 | 42.17 | 60.14 | 47.80 | 39.63 | 40.25 | 47.50 | 44.00 | 54.50 | 56.50 | 69.00 | 62.20 | 56.00 | 53.17 | 41.17 | 63.56 | 100 |
| Wn | 20.50 | 28.29 | 36.29 | 42.17 | 51.50 | 45.80 | 47.33 | 35.67 | 37.83 | 45.00 | 32.20 | 15.83 | 6.29 | 2.75 | 4.17 | 0.00 | 0.00 | 4.86 | 2.60 | 4.63 | 6.75 | 0.00 | 0.00 | 5.50 | 10.00 | 6.17 | 0.00 | 0.00 | 2.33 | 1.83 | 16.54 | 26.03 |
| Ws | 37.33 | 40.14 | 35.14 | 46.17 | 49.00 | 42.40 | 50.33 | 55.67 | 56.33 | 52.75 | 48.20 | 47.17 | 41.29 | 39.50 | 53.17 | 46.63 | 42.17 | 55.29 | 45.20 | 35.00 | 33.50 | 47.50 | 44.00 | 49.00 | 46.50 | 62.83 | 62.20 | 56.00 | 50.83 | 39.33 | 47.02 | 73.97 |
| n | 4.67 | 5.14 | 5.29 | 6.50 | 6.83 | 5.20 | 5.67 | 5.50 | 5.50 | 6.75 | 5.80 | 5.00 | 3.29 | 2.38 | 3.33 | 2.50 | 2.00 | 3.43 | 3.00 | 2.88 | 3.25 | 3.67 | 2.75 | 3.00 | 2.50 | 3.17 | 2.20 | 2.40 | 2.33 | 1.67 | 3.92 | 100 |
| A | 1.17 | 1.00 | 0.71 | 1.17 | 2.00 | 1.00 | 1.83 | 2.17 | 1.00 | 2.25 | 0.80 | 1.17 | 0.86 | 0.38 | 0.83 | 1.38 | 0.17 | 0.71 | 0.80 | 0.50 | 0.75 | 0.83 | 0.50 | 1.00 | 0.67 | 1.00 | 0.00 | 0.40 | 1.00 | 0.50 | 0.95 | 24.27 |
| B | 0.17 | 0.71 | 0.29 | 0.17 | 0.00 | 0.80 | 0.83 | 0.33 | 1.00 | 0.50 | 3.00 | 2.17 | 1.71 | 0.38 | 0.50 | 0.00 | 0.17 | 0.43 | 0.20 | 0.25 | 1.25 | 0.67 | 0.50 | 0.75 | 0.83 | 0.50 | 0.20 | 0.00 | 0.00 | 0.17 | 0.62 | 15.71 |
| C | 0.33 | 0.14 | 1.29 | 1.17 | 1.33 | 1.60 | 1.00 | 0.50 | 1.33 | 1.25 | 2.00 | 1.00 | 0.43 | 0.63 | 0.33 | 0.13 | 0.00 | 0.14 | 0.40 | 0.88 | 0.25 | 0.17 | 0.75 | 0.25 | 0.00 | 0.50 | 0.20 | 0.20 | 0.00 | 0.00 | 0.61 | 15.47 |
| D | 1.17 | 1.43 | 0.71 | 1.00 | 1.33 | 1.40 | 1.50 | 1.67 | 2.00 | 1.75 | 0.00 | 0.00 | 0.29 | 1.00 | 1.33 | 1.00 | 1.00 | 1.29 | 1.00 | 0.38 | 0.25 | 0.50 | 0.25 | 0.25 | 0.00 | 0.00 | 0.80 | 0.60 | 0.17 | 0.17 | 0.81 | 20.60 |
| 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 | 0.50 | 0.75 | 1.00 | 0.83 | 1.00 | 1.00 | 0.50 | 0.33 | 0.20 | 5.03 |
| 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 | 0.17 | 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 | 0.67 | 0.25 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.50 | 0.50 | 0.08 | 2.06 |
| H | 0.33 | 0.14 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.97 |
| I | 1.50 | 1.71 | 2.29 | 2.50 | 2.17 | 0.40 | 0.50 | 0.67 | 0.00 | 1.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.33 | 0.00 | 0.67 | 0.86 | 0.60 | 0.88 | 0.75 | 0.67 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.20 | 0.17 | 0.00 | 0.62 | 15.89 |
| x | 1.33 | 1.71 | 1.00 | 1.33 | 2.00 | 1.80 | 2.67 | 2.50 | 2.00 | 2.75 | 3.80 | 3.33 | 2.57 | 0.75 | 1.33 | 1.38 | 0.33 | 1.14 | 1.00 | 0.75 | 2.00 | 1.50 | 1.00 | 1.75 | 1.50 | 1.50 | 0.20 | 0.40 | 1.00 | 0.67 | 1.57 | 39.98 |
| r | 0.17 | 0.00 | 0.71 | 0.67 | 1.17 | 0.20 | 0.17 | 0.00 | 0.50 | 0.25 | 1.20 | 0.50 | 0.29 | 0.50 | 0.67 | 0.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.67 | 0.00 | 0.40 | 0.00 | 0.00 | 0.30 | 7.54 |
| s | 2.00 | 2.57 | 2.71 | 2.50 | 2.17 | 1.80 | 1.33 | 1.50 | 1.50 | 1.75 | 0.40 | 0.17 | 0.00 | 0.25 | 0.17 | 0.13 | 0.50 | 1.00 | 1.40 | 1.50 | 0.75 | 0.67 | 0.50 | 0.00 | 0.00 | 0.00 | 0.80 | 0.60 | 0.33 | 0.00 | 0.97 | 24.66 |
| a | 0.67 | 0.57 | 0.86 | 1.50 | 1.33 | 1.40 | 1.33 | 1.17 | 1.50 | 2.00 | 0.40 | 1.00 | 0.43 | 0.88 | 0.83 | 0.75 | 0.67 | 1.14 | 0.60 | 0.63 | 0.50 | 0.67 | 0.00 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.71 | 18.09 |
| h | 0.33 | 0.29 | 0.00 | 0.33 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.50 | 0.00 | 0.17 | 0.00 | 0.60 | 0.80 | 0.67 | 0.50 | 0.17 | 4.41 |
| k | 0.17 | 0.00 | 0.00 | 0.17 | 0.17 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.50 | 0.75 | 0.83 | 1.00 | 0.40 | 0.20 | 0.33 | 0.50 | 0.21 | 5.33 |
| x | 3.00 | 2.86 | 3.00 | 4.17 | 4.17 | 1.40 | 2.33 | 2.83 | 1.00 | 3.25 | 0.80 | 1.83 | 0.86 | 0.38 | 1.17 | 1.38 | 0.83 | 1.57 | 1.40 | 1.38 | 1.50 | 1.67 | 0.50 | 1.00 | 0.67 | 1.17 | 0.00 | 0.60 | 1.17 | 0.50 | 1.61 | 41.13 |
| o | 1.67 | 2.14 | 2.29 | 2.17 | 2.50 | 3.60 | 3.17 | 2.50 | 4.33 | 3.50 | 5.00 | 3.17 | 2.43 | 2.00 | 1.67 | 0.38 | 0.33 | 1.43 | 1.40 | 1.50 | 1.75 | 2.00 | 1.75 | 1.25 | 0.83 | 1.17 | 1.20 | 0.80 | 0.67 | 0.83 | 1.98 | 50.53 |
| i | 0.00 | 0.14 | 0.00 | 0.17 | 0.17 | 0.20 | 0.17 | 0.17 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.75 | 0.83 | 0.43 | 0.20 | 0.00 | 0.00 | 0.00 | 0.50 | 0.75 | 1.00 | 0.83 | 1.00 | 1.00 | 0.50 | 0.33 | 0.33 | 8.34 |
| 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 |
| CV | 62.17 | 63.14 | 47.57 | 73.33 | 61.17 | 52.00 | 54.50 | 63.50 | 60.50 | 60.25 | 20.40 | 17.17 | 12.29 | 24.00 | 40.17 | 30.00 | 36.67 | 38.71 | 33.80 | 26.50 | 18.25 | 59.50 | 56.50 | 43.75 | 50.33 | 51.67 | 72.00 | 69.00 | 56.33 | 48.67 | 46.79 | 100 |
| CVn | 18.00 | 20.00 | 26.14 | 28.50 | 28.00 | 21.40 | 25.17 | 28.00 | 25.17 | 24.50 | 5.40 | 3.00 | 0.71 | 0.25 | 0.50 | 0.00 | 0.00 | 1.43 | 0.20 | 0.63 | 6.75 | 0.00 | 0.00 | 0.50 | 1.33 | 0.67 | 0.00 | 0.00 | 0.17 | 0.17 | 8.89 | 18.99 |
| CVs | 44.17 | 43.14 | 21.43 | 44.83 | 33.17 | 30.60 | 29.33 | 35.50 | 35.33 | 35.75 | 15.00 | 14.17 | 11.57 | 23.75 | 39.67 | 30.00 | 36.67 | 37.29 | 33.60 | 25.88 | 11.50 | 59.50 | 56.50 | 43.25 | 49.00 | 51.00 | 72.00 | 69.00 | 56.17 | 48.50 | 37.91 | 81.01 |
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