Statistics of sunspot activity
December, 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 | 31 | Average | % |
| W | 20.80 | 35.40 | 22.00 | 23.40 | 16.60 | 27.67 | 24.00 | 30.33 | 30.80 | 21.17 | 29.33 | 36.40 | 31.40 | 32.75 | 30.50 | 31.50 | 24.33 | 13.17 | 11.80 | 17.00 | 22.25 | 13.40 | 12.50 | 17.60 | 28.00 | 22.50 | 18.80 | 22.00 | 26.00 | 13.20 | 11.00 | 23.15 | 100 |
| Wn | 0.00 | 7.00 | 12.40 | 16.00 | 16.60 | 13.33 | 6.80 | 0.00 | 2.60 | 5.67 | 8.33 | 13.40 | 13.60 | 15.50 | 16.25 | 18.00 | 16.33 | 13.17 | 11.80 | 17.00 | 14.00 | 2.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.67 | 0.00 | 0.00 | 7.86 | 33.95 |
| Ws | 20.80 | 28.40 | 9.60 | 7.40 | 0.00 | 14.33 | 17.20 | 30.33 | 28.20 | 15.50 | 21.00 | 23.00 | 17.80 | 17.25 | 14.25 | 13.50 | 8.00 | 0.00 | 0.00 | 0.00 | 8.25 | 11.20 | 12.50 | 17.60 | 28.00 | 22.50 | 18.80 | 22.00 | 22.33 | 13.20 | 11.00 | 15.29 | 66.05 |
| n | 1.60 | 3.00 | 1.80 | 1.60 | 1.00 | 2.00 | 1.80 | 2.00 | 2.60 | 1.50 | 1.67 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 1.67 | 1.00 | 1.00 | 1.50 | 2.00 | 1.20 | 1.00 | 1.20 | 2.00 | 1.67 | 1.20 | 1.00 | 2.00 | 1.20 | 1.00 | 1.65 | 100 |
| A | 0.20 | 1.60 | 0.60 | 0.60 | 0.00 | 0.33 | 0.80 | 0.50 | 1.40 | 0.67 | 0.00 | 0.20 | 0.20 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.75 | 1.75 | 1.00 | 0.50 | 0.00 | 0.00 | 0.17 | 0.20 | 0.00 | 0.83 | 1.00 | 1.00 | 0.47 | 28.26 |
| B | 0.40 | 0.80 | 0.60 | 0.00 | 0.60 | 1.17 | 0.20 | 0.67 | 1.20 | 0.50 | 0.17 | 0.20 | 0.60 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.20 | 0.50 | 0.40 | 1.67 | 0.67 | 0.60 | 0.83 | 1.17 | 0.00 | 0.00 | 0.46 | 28.09 |
| C | 0.00 | 0.00 | 0.20 | 0.20 | 0.00 | 0.33 | 0.00 | 0.83 | 0.00 | 0.00 | 0.17 | 0.60 | 0.20 | 0.50 | 1.00 | 0.33 | 0.50 | 0.83 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.60 | 0.33 | 0.83 | 0.40 | 0.17 | 0.00 | 0.00 | 0.00 | 0.28 | 16.86 |
| D | 0.40 | 0.00 | 0.40 | 0.60 | 0.40 | 0.17 | 0.80 | 0.00 | 0.00 | 0.33 | 1.17 | 1.00 | 1.00 | 1.00 | 0.75 | 1.67 | 1.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.36 | 21.58 |
| 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 | 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 | 0.00 |
| G | 0.60 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 1.95 |
| 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 | 0.00 |
| I | 0.00 | 0.20 | 0.00 | 0.20 | 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 | 0.40 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.05 | 3.26 |
| x | 0.60 | 2.40 | 1.20 | 0.60 | 0.60 | 1.50 | 1.00 | 1.17 | 2.60 | 1.17 | 0.17 | 0.40 | 0.80 | 0.50 | 0.25 | 0.00 | 0.17 | 0.00 | 0.00 | 1.00 | 2.00 | 1.20 | 1.00 | 0.40 | 1.67 | 0.83 | 0.80 | 0.83 | 2.00 | 1.00 | 1.00 | 0.93 | 56.35 |
| r | 0.00 | 0.00 | 0.40 | 0.60 | 0.00 | 0.17 | 0.60 | 0.50 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.50 | 0.25 | 0.17 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 8.95 |
| s | 0.40 | 0.60 | 0.00 | 0.00 | 0.20 | 0.17 | 0.00 | 0.17 | 0.00 | 0.17 | 0.50 | 0.80 | 0.20 | 0.25 | 0.75 | 1.50 | 0.50 | 0.67 | 0.60 | 0.25 | 0.00 | 0.00 | 0.00 | 0.60 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.27 | 16.57 |
| a | 0.40 | 0.00 | 0.20 | 0.40 | 0.20 | 0.17 | 0.20 | 0.17 | 0.00 | 0.17 | 0.67 | 0.60 | 1.00 | 0.75 | 0.75 | 0.33 | 1.00 | 0.33 | 0.20 | 0.25 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.17 | 0.20 | 0.17 | 0.00 | 0.20 | 0.00 | 0.28 | 17.02 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 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 | 0.01 | 0.72 |
| k | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.39 |
| x | 0.20 | 1.80 | 0.60 | 0.80 | 0.00 | 0.33 | 0.80 | 0.50 | 1.40 | 0.67 | 0.17 | 0.20 | 0.20 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.40 | 1.25 | 1.75 | 1.00 | 0.50 | 0.00 | 0.00 | 0.17 | 0.20 | 0.00 | 0.83 | 1.20 | 1.00 | 0.52 | 31.51 |
| o | 1.40 | 1.20 | 1.20 | 0.80 | 1.00 | 1.67 | 1.00 | 1.50 | 1.20 | 0.83 | 1.50 | 1.80 | 1.80 | 2.00 | 2.00 | 2.00 | 1.50 | 1.00 | 0.60 | 0.25 | 0.25 | 0.20 | 0.50 | 1.20 | 2.00 | 1.50 | 1.00 | 0.83 | 1.17 | 0.00 | 0.00 | 1.13 | 68.16 |
| i | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 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 | 0.01 | 0.33 |
| 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 | 27.80 | 15.60 | 9.20 | 12.00 | 10.00 | 8.50 | 12.80 | 7.50 | 3.80 | 9.00 | 32.00 | 34.00 | 22.60 | 24.00 | 25.00 | 42.33 | 25.17 | 11.83 | 8.80 | 5.50 | 2.25 | 1.40 | 1.50 | 11.20 | 5.00 | 7.17 | 4.00 | 3.17 | 3.17 | 2.40 | 1.00 | 12.57 | 100 |
| CVn | 0.00 | 0.80 | 8.00 | 11.40 | 10.00 | 3.67 | 0.60 | 0.00 | 0.40 | 0.50 | 6.00 | 6.60 | 3.60 | 3.50 | 6.50 | 21.67 | 17.33 | 11.83 | 8.80 | 5.50 | 1.50 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 4.15 | 33.04 |
| CVs | 27.80 | 14.80 | 1.20 | 0.60 | 0.00 | 4.83 | 12.20 | 7.50 | 3.40 | 8.50 | 26.00 | 27.40 | 19.00 | 20.50 | 18.50 | 20.67 | 7.83 | 0.00 | 0.00 | 0.00 | 0.75 | 1.20 | 1.50 | 11.20 | 5.00 | 7.17 | 4.00 | 3.17 | 2.83 | 2.40 | 1.00 | 8.42 | 66.96 |
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