Statistics of sunspot activity
December, 1988
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 | 151.00 | 129.33 | 164.71 | 175.80 | 163.67 | 210.20 | 162.75 | 132.00 | 133.25 | 146.25 | 208.40 | 206.33 | 224.00 | 246.86 | 230.50 | 263.17 | 276.25 | 272.00 | 234.75 | 258.17 | 234.86 | 287.00 | 279.33 | 223.17 | 238.00 | 189.83 | 184.43 | 223.67 | 229.14 | 192.50 | 190.57 | 208.45 | 100 |
| Wn | 95.83 | 82.67 | 100.86 | 100.20 | 79.00 | 98.20 | 74.75 | 58.50 | 55.25 | 73.00 | 83.20 | 81.17 | 103.40 | 129.71 | 128.50 | 167.33 | 187.50 | 193.14 | 170.25 | 194.00 | 176.86 | 203.00 | 196.67 | 170.00 | 169.50 | 118.83 | 101.00 | 115.00 | 97.86 | 80.00 | 60.14 | 120.82 | 57.96 |
| Ws | 55.17 | 46.67 | 63.86 | 75.60 | 84.67 | 112.00 | 88.00 | 73.50 | 78.00 | 73.25 | 125.20 | 125.17 | 120.60 | 117.14 | 102.00 | 95.83 | 88.75 | 78.86 | 64.50 | 64.17 | 58.00 | 84.00 | 82.67 | 53.17 | 68.50 | 71.00 | 83.43 | 108.67 | 131.29 | 112.50 | 130.43 | 87.63 | 42.04 |
| n | 7.00 | 6.33 | 8.86 | 10.00 | 10.17 | 13.40 | 11.75 | 9.00 | 9.25 | 9.75 | 12.20 | 11.67 | 12.20 | 12.86 | 10.75 | 11.83 | 11.25 | 11.57 | 10.00 | 9.50 | 10.43 | 13.40 | 13.33 | 11.67 | 12.00 | 8.67 | 7.43 | 9.50 | 10.14 | 9.33 | 7.57 | 10.41 | 100 |
| A | 1.00 | 0.00 | 2.29 | 0.00 | 0.50 | 0.40 | 2.00 | 0.50 | 0.25 | 0.75 | 1.60 | 0.67 | 0.20 | 1.14 | 0.25 | 0.67 | 1.00 | 1.14 | 0.75 | 0.83 | 1.29 | 1.00 | 1.17 | 1.50 | 0.67 | 0.50 | 0.14 | 0.67 | 2.71 | 2.00 | 0.71 | 0.91 | 8.77 |
| B | 0.17 | 1.17 | 0.86 | 0.40 | 1.00 | 2.00 | 2.00 | 1.50 | 0.75 | 0.75 | 1.60 | 1.17 | 0.60 | 0.43 | 0.50 | 1.00 | 1.25 | 2.14 | 1.00 | 0.50 | 0.71 | 1.60 | 0.83 | 0.50 | 2.17 | 1.17 | 1.57 | 2.00 | 0.71 | 1.17 | 1.00 | 1.10 | 10.60 |
| C | 1.33 | 0.67 | 1.00 | 3.00 | 3.17 | 4.00 | 4.00 | 4.50 | 2.50 | 3.75 | 3.40 | 4.33 | 4.80 | 1.57 | 0.75 | 1.50 | 1.75 | 2.57 | 0.75 | 0.17 | 0.43 | 1.80 | 2.33 | 2.00 | 1.33 | 1.33 | 0.71 | 2.00 | 2.00 | 1.00 | 1.29 | 2.12 | 20.36 |
| D | 4.33 | 3.50 | 2.86 | 1.80 | 3.50 | 4.40 | 1.75 | 0.50 | 1.75 | 1.25 | 3.20 | 1.33 | 2.00 | 3.00 | 2.75 | 2.83 | 2.00 | 2.29 | 2.25 | 3.67 | 3.71 | 3.40 | 4.17 | 3.00 | 2.83 | 2.00 | 2.71 | 2.17 | 1.71 | 2.33 | 3.00 | 2.65 | 25.40 |
| E | 0.00 | 0.67 | 0.43 | 1.00 | 0.17 | 0.20 | 0.00 | 0.00 | 0.25 | 0.00 | 0.20 | 0.50 | 0.40 | 1.43 | 1.00 | 1.33 | 2.75 | 1.86 | 2.75 | 2.00 | 1.00 | 1.00 | 2.00 | 0.83 | 1.00 | 1.67 | 0.57 | 1.67 | 2.29 | 1.33 | 1.29 | 1.02 | 9.78 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.17 | 0.00 | 0.57 | 0.50 | 1.17 | 0.75 | 1.14 | 1.50 | 1.33 | 0.43 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.17 | 0.00 | 0.28 | 2.66 |
| G | 0.17 | 0.33 | 0.71 | 1.20 | 0.67 | 0.60 | 0.25 | 0.25 | 0.25 | 0.00 | 0.40 | 1.50 | 2.40 | 1.43 | 1.75 | 0.50 | 0.50 | 0.43 | 1.00 | 1.00 | 2.43 | 4.00 | 1.83 | 2.17 | 1.83 | 1.00 | 1.29 | 0.83 | 0.57 | 0.83 | 0.29 | 1.05 | 10.04 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 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 | 0.14 | 0.20 | 0.00 | 0.17 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.06 | 0.55 |
| I | 0.00 | 0.00 | 0.71 | 2.60 | 0.83 | 1.80 | 1.50 | 1.75 | 3.50 | 2.75 | 1.80 | 2.00 | 1.80 | 3.29 | 3.25 | 2.83 | 1.25 | 0.00 | 0.00 | 0.00 | 0.29 | 0.20 | 1.00 | 1.50 | 2.17 | 0.83 | 0.43 | 0.00 | 0.14 | 0.00 | 0.00 | 1.23 | 11.84 |
| x | 1.17 | 1.17 | 3.14 | 0.40 | 1.50 | 2.40 | 4.00 | 2.00 | 1.00 | 1.50 | 3.20 | 1.83 | 0.80 | 1.57 | 0.75 | 1.67 | 2.25 | 3.29 | 1.75 | 1.33 | 2.00 | 2.60 | 2.00 | 2.00 | 2.83 | 1.67 | 1.71 | 2.67 | 3.43 | 3.17 | 1.71 | 2.02 | 19.36 |
| r | 0.50 | 0.50 | 0.14 | 0.60 | 0.50 | 1.40 | 1.25 | 1.50 | 0.50 | 0.75 | 0.80 | 1.67 | 1.60 | 0.71 | 0.25 | 0.33 | 1.25 | 1.00 | 0.50 | 0.00 | 0.14 | 0.20 | 0.83 | 0.17 | 0.00 | 1.17 | 0.86 | 0.83 | 0.71 | 0.33 | 0.14 | 0.68 | 6.55 |
| s | 1.83 | 1.50 | 2.86 | 4.60 | 3.50 | 5.00 | 4.00 | 2.50 | 5.50 | 6.00 | 5.00 | 4.83 | 7.40 | 5.14 | 4.75 | 4.67 | 3.00 | 1.57 | 0.75 | 0.83 | 1.43 | 2.60 | 3.17 | 3.00 | 3.50 | 2.17 | 0.86 | 1.00 | 1.14 | 1.00 | 1.43 | 3.11 | 29.90 |
| a | 2.50 | 2.00 | 1.71 | 3.00 | 3.83 | 3.60 | 1.75 | 3.00 | 2.25 | 1.25 | 3.20 | 1.67 | 1.20 | 3.86 | 3.25 | 3.17 | 2.25 | 2.71 | 3.25 | 2.83 | 3.29 | 5.00 | 3.67 | 3.33 | 3.67 | 1.17 | 2.71 | 3.50 | 3.43 | 3.50 | 4.00 | 2.89 | 27.74 |
| h | 0.83 | 0.83 | 0.86 | 1.20 | 0.17 | 0.80 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.50 | 0.83 | 1.00 | 0.40 | 0.50 | 0.00 | 0.33 | 0.83 | 0.29 | 0.00 | 0.43 | 0.33 | 0.00 | 0.36 | 3.48 |
| k | 0.17 | 0.33 | 0.14 | 0.20 | 0.67 | 0.20 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 1.50 | 1.20 | 1.57 | 1.75 | 1.83 | 2.50 | 3.00 | 3.25 | 3.67 | 2.57 | 2.60 | 3.17 | 3.17 | 1.67 | 1.67 | 1.00 | 1.50 | 1.00 | 1.00 | 0.29 | 1.35 | 12.97 |
| x | 1.00 | 0.00 | 3.00 | 2.60 | 1.67 | 2.20 | 3.75 | 2.25 | 3.75 | 3.50 | 3.40 | 2.67 | 2.00 | 4.43 | 3.50 | 3.50 | 2.25 | 1.14 | 0.75 | 0.83 | 1.71 | 1.40 | 2.17 | 3.17 | 2.83 | 1.50 | 0.57 | 0.67 | 2.86 | 2.50 | 0.71 | 2.20 | 21.15 |
| o | 4.50 | 4.33 | 3.71 | 5.00 | 7.50 | 10.80 | 8.00 | 6.50 | 4.75 | 5.50 | 6.80 | 7.83 | 9.80 | 5.57 | 5.00 | 4.67 | 5.25 | 6.86 | 4.00 | 2.50 | 5.00 | 10.40 | 8.00 | 6.33 | 7.17 | 5.33 | 4.57 | 5.67 | 4.43 | 4.17 | 3.71 | 5.92 | 56.89 |
| i | 1.50 | 1.83 | 2.14 | 2.20 | 0.83 | 0.40 | 0.00 | 0.25 | 0.75 | 0.75 | 2.00 | 1.17 | 0.40 | 2.71 | 2.00 | 3.17 | 3.00 | 3.00 | 4.25 | 5.67 | 3.43 | 1.00 | 3.00 | 2.17 | 2.00 | 1.83 | 2.29 | 2.83 | 2.71 | 2.67 | 3.14 | 2.10 | 20.17 |
| c | 0.00 | 0.17 | 0.00 | 0.20 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.25 | 0.50 | 0.75 | 0.57 | 1.00 | 0.50 | 0.29 | 0.60 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.14 | 0.00 | 0.00 | 0.19 | 1.79 |
| CV | 136.67 | 140.67 | 142.14 | 184.20 | 162.83 | 197.20 | 126.00 | 70.25 | 111.25 | 112.25 | 139.00 | 178.83 | 198.60 | 229.00 | 217.00 | 231.50 | 232.00 | 229.29 | 276.75 | 302.33 | 270.43 | 293.80 | 300.50 | 244.33 | 213.33 | 189.33 | 141.00 | 166.33 | 162.14 | 156.17 | 123.00 | 189.62 | 100 |
| CVn | 70.83 | 73.00 | 61.86 | 77.60 | 74.83 | 91.60 | 61.25 | 34.25 | 52.50 | 48.75 | 57.60 | 65.17 | 101.80 | 134.29 | 128.25 | 146.83 | 165.00 | 171.00 | 218.25 | 232.00 | 205.57 | 224.80 | 226.50 | 198.67 | 173.00 | 131.33 | 90.86 | 102.50 | 91.86 | 85.83 | 43.14 | 117.44 | 61.94 |
| CVs | 65.83 | 67.67 | 80.29 | 106.60 | 88.00 | 105.60 | 64.75 | 36.00 | 58.75 | 63.50 | 81.40 | 113.67 | 96.80 | 94.71 | 88.75 | 84.67 | 67.00 | 58.29 | 58.50 | 70.33 | 64.86 | 69.00 | 74.00 | 45.67 | 40.33 | 58.00 | 50.14 | 63.83 | 70.29 | 70.33 | 79.86 | 72.17 | 38.06 |
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