Statistics of sunspot activity
September, 1984
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 | 60.17 | 70.00 | 78.17 | 75.17 | 71.75 | 39.33 | 26.60 | 22.83 | 14.67 | 14.50 | 12.00 | 12.00 | 0.00 | 0.00 | 11.00 | 15.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.17 | 14.00 | 11.00 | 12.00 | 0.00 | 0.00 | 0.00 | 11.00 | 29.00 | 0.00 | 20.41 | 100 |
| Wn | 21.00 | 26.17 | 25.83 | 24.67 | 39.25 | 26.17 | 22.20 | 7.83 | 0.00 | 2.00 | 7.60 | 0.00 | 0.00 | 0.00 | 11.00 | 15.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.00 | 29.00 | 0.00 | 8.96 | 43.88 |
| Ws | 39.17 | 43.83 | 52.33 | 50.50 | 32.50 | 13.17 | 4.40 | 15.00 | 14.67 | 12.50 | 4.40 | 12.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.17 | 14.00 | 11.00 | 12.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.45 | 56.12 |
| n | 2.83 | 3.83 | 4.00 | 4.67 | 5.00 | 3.00 | 2.00 | 1.83 | 1.00 | 1.17 | 1.00 | 1.00 | 0.00 | 0.00 | 1.00 | 1.33 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.20 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 2.00 | 0.00 | 1.36 | 100 |
| A | 1.17 | 1.50 | 0.67 | 0.67 | 1.00 | 0.50 | 0.40 | 0.67 | 0.00 | 0.17 | 0.40 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.45 | 33.36 |
| B | 0.17 | 0.67 | 0.67 | 0.83 | 1.00 | 1.17 | 0.40 | 0.67 | 0.33 | 0.67 | 0.60 | 1.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.34 | 24.96 |
| C | 0.17 | 0.17 | 1.00 | 0.67 | 1.50 | 0.50 | 0.00 | 0.00 | 0.67 | 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 | 0.16 | 11.42 |
| D | 1.00 | 1.00 | 1.50 | 2.33 | 0.75 | 0.33 | 1.00 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.28 | 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 | 0.00 | 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 | 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 | 0.00 | 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 |
| 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 | 0.00 | 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 |
| I | 0.33 | 0.50 | 0.17 | 0.17 | 0.75 | 0.50 | 0.20 | 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 | 1.00 | 0.00 | 0.13 | 9.67 |
| x | 1.33 | 2.17 | 1.33 | 1.50 | 2.00 | 1.67 | 0.80 | 1.33 | 0.33 | 0.83 | 1.00 | 1.00 | 0.00 | 0.00 | 1.00 | 1.33 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.20 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.79 | 58.32 |
| r | 0.33 | 0.33 | 0.17 | 0.17 | 1.00 | 0.17 | 0.00 | 0.00 | 0.33 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 6.53 |
| s | 0.17 | 0.33 | 0.83 | 0.50 | 0.50 | 0.83 | 0.40 | 0.17 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.17 | 12.40 |
| a | 0.50 | 0.50 | 1.00 | 1.50 | 1.25 | 0.33 | 0.80 | 0.33 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.21 | 15.62 |
| 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 | 0.00 | 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 |
| k | 0.50 | 0.50 | 0.67 | 1.00 | 0.25 | 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 | 0.10 | 7.14 |
| x | 1.50 | 2.00 | 0.83 | 0.83 | 1.75 | 1.00 | 0.60 | 0.67 | 0.00 | 0.50 | 0.40 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.59 | 43.03 |
| o | 0.33 | 0.83 | 2.33 | 3.17 | 3.00 | 2.00 | 1.20 | 1.17 | 1.00 | 0.67 | 0.60 | 1.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.64 | 47.31 |
| i | 0.83 | 0.83 | 0.67 | 0.67 | 0.25 | 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 | 0.12 | 8.44 |
| c | 0.17 | 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 | 0.00 | 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 | 0.02 | 1.22 |
| CV | 40.17 | 43.17 | 61.83 | 80.83 | 40.75 | 19.17 | 24.00 | 12.50 | 5.50 | 3.83 | 1.60 | 2.00 | 0.00 | 0.00 | 1.00 | 1.67 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 | 1.40 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 1.00 | 12.00 | 0.00 | 11.86 | 100 |
| CVn | 4.67 | 6.17 | 8.67 | 12.00 | 11.00 | 11.67 | 21.80 | 3.67 | 0.00 | 0.33 | 1.20 | 0.00 | 0.00 | 0.00 | 1.00 | 1.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 12.00 | 0.00 | 3.23 | 27.21 |
| CVs | 35.50 | 37.00 | 53.17 | 68.83 | 29.75 | 7.50 | 2.20 | 8.83 | 5.50 | 3.50 | 0.40 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 | 1.40 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 8.64 | 72.79 |
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