Statistics of sunspot activity
December, 1989
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 | 237.86 | 241.57 | 241.17 | 213.80 | 227.33 | 205.50 | 242.67 | 214.67 | 196.60 | 170.00 | 118.80 | 120.00 | 128.33 | 133.29 | 99.33 | 122.50 | 147.00 | 142.33 | 151.40 | 135.00 | 143.20 | 192.17 | 223.29 | 210.29 | 229.43 | 252.00 | 315.40 | 236.83 | 220.20 | 224.14 | 237.57 | 192.70 | 100 |
| Wn | 144.14 | 133.43 | 148.67 | 140.20 | 149.50 | 134.83 | 152.00 | 136.67 | 111.00 | 104.33 | 70.00 | 77.29 | 87.50 | 87.43 | 64.33 | 75.17 | 99.00 | 101.33 | 98.60 | 78.60 | 75.80 | 72.33 | 85.43 | 78.29 | 83.86 | 98.50 | 113.60 | 83.33 | 76.20 | 86.57 | 112.14 | 101.94 | 52.90 |
| Ws | 93.71 | 108.14 | 92.50 | 73.60 | 77.83 | 70.67 | 90.67 | 78.00 | 85.60 | 65.67 | 48.80 | 42.71 | 40.83 | 45.86 | 35.00 | 47.33 | 48.00 | 41.00 | 52.80 | 56.40 | 67.40 | 119.83 | 137.86 | 132.00 | 145.57 | 153.50 | 201.80 | 153.50 | 144.00 | 137.57 | 125.43 | 90.76 | 47.10 |
| n | 13.57 | 14.00 | 12.67 | 12.00 | 11.83 | 11.00 | 13.33 | 12.17 | 12.20 | 9.33 | 7.20 | 8.29 | 8.00 | 8.86 | 6.83 | 8.33 | 7.43 | 7.33 | 8.60 | 7.80 | 7.80 | 12.00 | 13.43 | 11.00 | 11.57 | 11.50 | 13.60 | 10.50 | 9.40 | 9.29 | 8.43 | 10.30 | 100 |
| A | 2.86 | 1.43 | 1.33 | 1.80 | 1.00 | 0.83 | 1.67 | 2.17 | 2.60 | 0.67 | 1.20 | 1.14 | 1.50 | 2.29 | 1.50 | 1.50 | 1.14 | 1.00 | 1.40 | 0.00 | 0.00 | 0.83 | 0.86 | 0.43 | 0.86 | 0.33 | 1.40 | 0.33 | 0.60 | 0.86 | 0.71 | 1.17 | 11.35 |
| B | 2.29 | 4.43 | 3.00 | 2.40 | 1.17 | 0.83 | 1.83 | 1.67 | 1.40 | 1.83 | 1.00 | 1.00 | 1.33 | 0.86 | 1.17 | 2.17 | 0.57 | 0.83 | 0.60 | 0.80 | 1.40 | 2.17 | 2.43 | 1.43 | 1.14 | 1.17 | 1.20 | 0.83 | 0.60 | 0.71 | 0.71 | 1.45 | 14.08 |
| C | 2.71 | 3.14 | 5.00 | 3.00 | 2.67 | 2.00 | 2.67 | 2.17 | 2.40 | 3.00 | 2.20 | 2.43 | 1.67 | 2.43 | 1.00 | 1.67 | 1.14 | 0.83 | 1.80 | 1.80 | 2.20 | 3.00 | 3.00 | 3.14 | 2.14 | 2.33 | 3.80 | 1.83 | 1.20 | 0.71 | 1.00 | 2.26 | 21.95 |
| D | 3.43 | 2.57 | 2.67 | 4.20 | 5.17 | 5.17 | 4.33 | 3.17 | 3.80 | 2.50 | 1.80 | 1.86 | 2.17 | 1.00 | 0.17 | 0.67 | 3.00 | 3.50 | 2.20 | 2.20 | 2.20 | 2.50 | 2.86 | 1.57 | 1.29 | 1.17 | 2.80 | 2.83 | 3.80 | 3.57 | 3.00 | 2.68 | 26.04 |
| E | 0.29 | 0.29 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.71 | 0.33 | 0.33 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.57 | 0.57 | 1.29 | 1.33 | 1.20 | 1.33 | 1.20 | 1.57 | 1.43 | 0.42 | 4.10 |
| 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 | 0.29 | 0.43 | 0.83 | 0.80 | 0.17 | 0.20 | 0.00 | 0.00 | 0.09 | 0.85 |
| G | 0.71 | 0.57 | 0.33 | 0.20 | 0.17 | 0.17 | 0.00 | 0.50 | 0.20 | 0.17 | 0.00 | 0.00 | 0.67 | 0.14 | 0.67 | 0.50 | 0.71 | 0.67 | 1.00 | 1.20 | 0.20 | 0.50 | 0.00 | 0.86 | 1.29 | 1.00 | 0.20 | 0.83 | 0.40 | 0.43 | 1.29 | 0.50 | 4.88 |
| H | 0.86 | 0.71 | 0.17 | 0.00 | 0.00 | 0.17 | 0.50 | 0.83 | 0.80 | 0.67 | 0.80 | 1.00 | 0.00 | 0.00 | 0.17 | 0.67 | 0.43 | 0.17 | 0.80 | 0.40 | 0.60 | 1.17 | 1.00 | 0.86 | 0.43 | 0.17 | 0.20 | 0.17 | 0.00 | 0.00 | 0.00 | 0.44 | 4.30 |
| I | 0.43 | 0.86 | 0.17 | 0.40 | 1.33 | 1.83 | 2.33 | 1.67 | 1.00 | 0.50 | 0.20 | 0.86 | 0.50 | 1.43 | 1.83 | 0.83 | 0.29 | 0.33 | 0.80 | 1.40 | 1.20 | 1.83 | 2.71 | 1.86 | 2.71 | 3.17 | 2.00 | 2.17 | 1.40 | 1.43 | 0.29 | 1.28 | 12.45 |
| x | 5.14 | 5.86 | 4.33 | 4.20 | 2.17 | 1.67 | 3.50 | 3.83 | 4.00 | 2.50 | 2.20 | 2.14 | 2.83 | 3.14 | 2.67 | 3.67 | 1.71 | 1.83 | 2.00 | 0.80 | 1.40 | 3.00 | 3.29 | 1.86 | 2.00 | 1.50 | 2.60 | 1.17 | 1.20 | 1.57 | 1.43 | 2.62 | 25.43 |
| r | 0.57 | 0.29 | 0.17 | 0.20 | 0.00 | 0.67 | 0.17 | 0.50 | 0.00 | 0.33 | 0.40 | 0.57 | 0.50 | 0.86 | 1.00 | 0.83 | 0.57 | 0.67 | 0.20 | 0.00 | 0.00 | 0.00 | 0.29 | 0.29 | 0.29 | 0.33 | 0.40 | 0.17 | 0.00 | 0.14 | 0.43 | 0.35 | 3.39 |
| s | 1.14 | 2.86 | 2.00 | 1.00 | 3.00 | 3.33 | 3.50 | 2.50 | 2.80 | 2.83 | 1.40 | 1.71 | 1.00 | 2.43 | 1.67 | 1.00 | 0.57 | 0.83 | 1.20 | 2.00 | 1.00 | 2.00 | 2.71 | 2.71 | 4.57 | 4.83 | 4.00 | 2.17 | 1.60 | 1.29 | 0.86 | 2.15 | 20.83 |
| a | 3.29 | 1.71 | 3.50 | 4.20 | 4.00 | 3.50 | 4.50 | 3.83 | 4.60 | 2.67 | 2.40 | 2.86 | 3.00 | 1.57 | 0.50 | 1.00 | 2.71 | 2.00 | 3.20 | 3.20 | 3.00 | 5.00 | 4.86 | 3.86 | 2.86 | 2.17 | 3.60 | 3.17 | 2.80 | 2.86 | 2.29 | 3.05 | 29.66 |
| h | 0.14 | 0.57 | 0.33 | 0.20 | 0.50 | 0.83 | 0.83 | 1.00 | 0.60 | 0.83 | 0.80 | 0.86 | 0.50 | 0.71 | 0.50 | 1.00 | 0.71 | 0.50 | 1.00 | 0.40 | 0.60 | 0.17 | 0.00 | 0.00 | 0.43 | 0.17 | 0.00 | 0.17 | 0.00 | 0.00 | 0.29 | 0.47 | 4.59 |
| k | 3.29 | 2.71 | 2.33 | 2.20 | 2.17 | 1.00 | 0.83 | 0.50 | 0.20 | 0.17 | 0.00 | 0.14 | 0.17 | 0.14 | 0.50 | 0.83 | 1.14 | 1.50 | 1.00 | 1.40 | 1.80 | 1.83 | 2.29 | 2.29 | 1.43 | 2.50 | 3.00 | 3.67 | 3.80 | 3.43 | 3.14 | 1.66 | 16.10 |
| x | 4.14 | 3.00 | 1.67 | 2.20 | 2.33 | 2.83 | 4.50 | 4.67 | 4.40 | 1.83 | 2.20 | 3.00 | 2.00 | 3.71 | 3.50 | 3.00 | 1.86 | 1.50 | 3.00 | 1.80 | 1.80 | 3.83 | 4.57 | 3.14 | 4.00 | 3.67 | 3.60 | 2.67 | 2.00 | 2.29 | 1.00 | 2.89 | 28.10 |
| o | 7.71 | 9.71 | 9.33 | 8.60 | 8.50 | 6.50 | 7.67 | 6.50 | 7.20 | 6.67 | 4.20 | 5.00 | 5.67 | 4.29 | 3.00 | 5.00 | 5.00 | 5.17 | 5.20 | 5.80 | 5.40 | 7.33 | 7.43 | 5.71 | 5.29 | 5.50 | 7.60 | 5.50 | 5.20 | 3.57 | 4.43 | 6.12 | 59.41 |
| i | 1.43 | 1.29 | 1.67 | 1.20 | 0.83 | 1.67 | 1.17 | 1.00 | 0.60 | 0.83 | 0.80 | 0.29 | 0.33 | 0.86 | 0.33 | 0.33 | 0.57 | 0.50 | 0.40 | 0.20 | 0.60 | 0.83 | 1.43 | 2.00 | 2.14 | 2.00 | 1.60 | 1.50 | 1.00 | 2.29 | 2.71 | 1.11 | 10.77 |
| c | 0.29 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.14 | 0.33 | 0.80 | 0.83 | 1.20 | 1.14 | 0.29 | 0.18 | 1.72 |
| CV | 224.71 | 216.57 | 189.33 | 185.40 | 228.67 | 203.00 | 192.83 | 166.00 | 152.40 | 131.83 | 93.80 | 107.43 | 101.00 | 102.14 | 80.00 | 116.00 | 144.29 | 152.83 | 157.80 | 158.80 | 156.40 | 174.00 | 197.29 | 190.14 | 201.43 | 224.17 | 252.00 | 248.17 | 244.80 | 232.71 | 221.43 | 175.72 | 100 |
| CVn | 149.57 | 159.14 | 143.67 | 147.80 | 176.17 | 150.33 | 130.50 | 117.67 | 106.00 | 105.50 | 74.60 | 83.29 | 74.67 | 81.86 | 59.67 | 70.33 | 90.00 | 90.50 | 96.80 | 81.20 | 83.60 | 84.17 | 96.71 | 77.57 | 67.43 | 73.83 | 78.00 | 85.00 | 79.60 | 92.00 | 103.86 | 100.36 | 57.11 |
| CVs | 75.14 | 57.43 | 45.67 | 37.60 | 52.50 | 52.67 | 62.33 | 48.33 | 46.40 | 26.33 | 19.20 | 24.14 | 26.33 | 20.29 | 20.33 | 45.67 | 54.29 | 62.33 | 61.00 | 77.60 | 72.80 | 89.83 | 100.57 | 112.57 | 134.00 | 150.33 | 174.00 | 163.17 | 165.20 | 140.71 | 117.57 | 75.37 | 42.89 |
|
