Statistics of sunspot activity
December, 2001
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 | 195.25 | 229.25 | 216.00 | 209.50 | 248.33 | 217.33 | 191.25 | 199.50 | 212.00 | 178.75 | 152.00 | 182.33 | 187.67 | 189.67 | 184.00 | 184.00 | 214.00 | 194.33 | 151.00 | 166.75 | 203.25 | 202.50 | 201.00 | 176.00 | 242.00 | 272.67 | 252.00 | 233.00 | 213.75 | 202.67 | 198.50 | 203.23 | 100 |
| Wn | 95.25 | 103.25 | 84.75 | 78.50 | 89.67 | 93.33 | 97.00 | 94.50 | 105.25 | 90.25 | 73.67 | 91.00 | 83.00 | 89.67 | 96.00 | 103.33 | 107.50 | 101.67 | 91.75 | 115.25 | 117.25 | 109.75 | 121.00 | 107.00 | 121.50 | 138.00 | 123.00 | 107.50 | 101.75 | 82.67 | 97.00 | 100.35 | 49.38 |
| Ws | 100.00 | 126.00 | 131.25 | 131.00 | 158.67 | 124.00 | 94.25 | 105.00 | 106.75 | 88.50 | 78.33 | 91.33 | 104.67 | 100.00 | 88.00 | 80.67 | 106.50 | 92.67 | 59.25 | 51.50 | 86.00 | 92.75 | 80.00 | 69.00 | 120.50 | 134.67 | 129.00 | 125.50 | 112.00 | 120.00 | 101.50 | 102.88 | 50.62 |
| n | 10.75 | 11.00 | 10.25 | 11.50 | 13.00 | 13.33 | 12.50 | 11.75 | 12.50 | 10.00 | 7.67 | 9.00 | 9.33 | 9.00 | 8.33 | 8.67 | 10.00 | 10.00 | 8.50 | 8.75 | 10.25 | 10.50 | 9.33 | 8.00 | 9.50 | 13.67 | 12.67 | 12.50 | 11.00 | 11.33 | 11.00 | 10.50 | 100 |
| A | 0.00 | 0.25 | 0.25 | 0.25 | 0.33 | 1.00 | 0.75 | 0.25 | 0.75 | 1.00 | 0.33 | 1.33 | 1.00 | 0.67 | 0.00 | 0.33 | 0.00 | 1.33 | 0.50 | 0.25 | 0.25 | 0.50 | 0.33 | 0.00 | 0.00 | 1.00 | 0.67 | 0.50 | 1.25 | 1.00 | 0.00 | 0.52 | 4.94 |
| B | 0.00 | 0.50 | 0.00 | 0.50 | 0.00 | 0.33 | 0.50 | 0.25 | 0.50 | 1.50 | 0.00 | 0.33 | 0.67 | 0.33 | 0.33 | 0.00 | 1.00 | 0.67 | 1.50 | 1.50 | 1.25 | 1.25 | 0.33 | 0.00 | 0.50 | 1.33 | 1.33 | 1.50 | 0.75 | 0.33 | 0.50 | 0.63 | 5.99 |
| C | 2.25 | 2.50 | 3.00 | 4.50 | 2.33 | 2.67 | 2.25 | 1.75 | 2.25 | 0.50 | 0.67 | 2.67 | 1.33 | 1.33 | 0.67 | 1.33 | 1.00 | 2.00 | 1.00 | 4.00 | 3.25 | 2.50 | 2.33 | 2.00 | 1.75 | 3.00 | 2.33 | 3.25 | 1.50 | 2.33 | 2.00 | 2.14 | 20.35 |
| D | 3.50 | 3.50 | 3.75 | 3.50 | 7.33 | 6.67 | 6.00 | 5.75 | 5.25 | 2.25 | 2.00 | 2.00 | 3.33 | 2.67 | 3.00 | 3.33 | 4.50 | 1.67 | 1.00 | 1.50 | 3.25 | 3.50 | 3.33 | 2.00 | 2.25 | 3.00 | 1.33 | 1.25 | 3.25 | 4.00 | 4.50 | 3.36 | 31.99 |
| E | 1.75 | 1.25 | 1.00 | 1.00 | 0.67 | 0.67 | 0.00 | 0.00 | 0.75 | 1.25 | 1.67 | 1.67 | 1.67 | 1.33 | 1.33 | 1.00 | 1.00 | 2.00 | 1.50 | 0.75 | 0.25 | 0.50 | 0.67 | 0.00 | 2.25 | 2.67 | 3.00 | 1.25 | 0.75 | 1.33 | 2.00 | 1.19 | 11.34 |
| F | 0.25 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.25 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.75 | 0.75 | 1.00 | 1.00 | 1.00 | 0.33 | 0.33 | 1.25 | 1.25 | 0.67 | 0.00 | 0.34 | 3.22 |
| G | 1.50 | 1.50 | 0.75 | 1.25 | 1.33 | 0.00 | 0.75 | 1.75 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.67 | 0.67 | 1.00 | 0.67 | 1.25 | 0.00 | 0.00 | 0.50 | 0.67 | 3.00 | 0.75 | 0.67 | 0.67 | 0.75 | 0.25 | 0.00 | 0.50 | 0.75 | 7.17 |
| H | 0.00 | 0.00 | 0.00 | 0.25 | 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 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 | 0.44 |
| I | 1.50 | 1.50 | 1.25 | 0.25 | 1.00 | 1.33 | 2.25 | 1.75 | 2.25 | 3.25 | 2.67 | 1.00 | 1.00 | 1.67 | 1.33 | 2.00 | 1.50 | 1.67 | 1.75 | 0.50 | 1.00 | 0.75 | 0.67 | 0.00 | 1.00 | 1.67 | 3.00 | 2.75 | 2.00 | 1.67 | 1.50 | 1.53 | 14.56 |
| x | 0.00 | 0.75 | 0.25 | 0.75 | 0.33 | 1.33 | 1.25 | 0.50 | 1.25 | 2.50 | 0.33 | 1.67 | 1.67 | 1.00 | 0.33 | 0.33 | 1.00 | 2.00 | 2.00 | 1.75 | 1.50 | 1.75 | 0.67 | 0.00 | 0.50 | 2.33 | 2.00 | 2.00 | 2.00 | 1.33 | 0.50 | 1.15 | 10.93 |
| r | 0.50 | 0.00 | 0.00 | 1.00 | 0.33 | 0.00 | 0.50 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.25 | 0.00 | 0.33 | 0.00 | 1.00 | 0.67 | 0.33 | 0.50 | 0.00 | 0.33 | 0.00 | 0.25 | 2.38 |
| s | 4.00 | 5.00 | 4.00 | 4.00 | 6.00 | 7.67 | 5.25 | 5.25 | 6.00 | 4.75 | 3.67 | 3.00 | 3.67 | 4.33 | 2.00 | 4.33 | 1.00 | 2.67 | 2.25 | 2.75 | 4.25 | 4.25 | 2.33 | 1.00 | 2.75 | 6.00 | 5.33 | 4.75 | 4.00 | 5.00 | 5.00 | 4.07 | 38.78 |
| a | 3.50 | 3.00 | 3.50 | 2.75 | 3.33 | 1.33 | 3.75 | 3.75 | 3.50 | 1.50 | 2.33 | 2.67 | 2.00 | 2.33 | 4.33 | 3.33 | 6.50 | 4.00 | 3.75 | 3.25 | 3.00 | 2.75 | 4.33 | 5.00 | 3.00 | 2.00 | 3.33 | 5.00 | 4.75 | 4.33 | 5.00 | 3.45 | 32.84 |
| h | 0.00 | 0.00 | 0.00 | 0.75 | 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 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.59 |
| k | 2.75 | 2.25 | 2.50 | 2.25 | 3.00 | 2.67 | 1.75 | 2.00 | 1.50 | 1.25 | 1.33 | 1.67 | 2.00 | 1.33 | 0.67 | 0.67 | 1.50 | 1.33 | 0.25 | 0.75 | 1.25 | 1.25 | 1.67 | 2.00 | 2.25 | 2.33 | 1.67 | 0.25 | 0.25 | 0.33 | 0.50 | 1.52 | 14.49 |
| x | 1.50 | 1.75 | 1.50 | 0.75 | 1.33 | 3.00 | 3.00 | 2.00 | 3.00 | 4.25 | 3.00 | 2.33 | 2.00 | 2.33 | 1.33 | 2.33 | 1.50 | 3.00 | 2.25 | 0.75 | 1.50 | 1.50 | 1.00 | 0.00 | 1.00 | 2.67 | 3.67 | 3.25 | 3.25 | 2.67 | 1.50 | 2.09 | 19.94 |
| o | 7.00 | 7.25 | 6.50 | 9.00 | 10.33 | 9.00 | 8.50 | 8.25 | 7.25 | 3.75 | 2.67 | 4.00 | 5.33 | 4.33 | 5.33 | 4.67 | 6.00 | 4.33 | 4.50 | 6.75 | 7.75 | 7.75 | 6.33 | 7.00 | 5.00 | 7.67 | 5.67 | 6.75 | 5.75 | 5.67 | 7.50 | 6.37 | 60.69 |
| i | 1.25 | 0.75 | 1.75 | 1.50 | 1.00 | 1.00 | 0.25 | 1.25 | 2.00 | 1.75 | 1.00 | 1.67 | 1.00 | 1.67 | 1.33 | 1.67 | 2.50 | 2.33 | 1.50 | 1.00 | 0.50 | 0.75 | 1.33 | 0.00 | 2.50 | 2.67 | 3.00 | 1.75 | 1.50 | 2.67 | 2.00 | 1.51 | 14.38 |
| c | 1.00 | 1.25 | 0.50 | 0.25 | 0.33 | 0.33 | 0.75 | 0.25 | 0.25 | 0.25 | 1.00 | 1.00 | 1.00 | 0.67 | 0.33 | 0.00 | 0.00 | 0.33 | 0.25 | 0.25 | 0.50 | 0.50 | 0.67 | 1.00 | 1.00 | 0.67 | 0.33 | 0.75 | 0.50 | 0.33 | 0.00 | 0.52 | 4.99 |
| CV | 260.75 | 244.75 | 233.00 | 255.75 | 312.67 | 299.00 | 241.00 | 255.25 | 233.00 | 160.75 | 164.67 | 169.33 | 202.67 | 184.00 | 162.00 | 161.67 | 193.00 | 167.67 | 118.75 | 119.75 | 176.25 | 205.75 | 197.33 | 201.00 | 227.50 | 278.00 | 221.00 | 176.75 | 171.25 | 188.67 | 203.50 | 206.01 | 100 |
| CVn | 137.75 | 109.00 | 98.00 | 109.25 | 134.00 | 133.67 | 101.50 | 101.50 | 107.50 | 83.00 | 63.00 | 60.67 | 67.33 | 54.67 | 64.67 | 84.67 | 98.00 | 98.00 | 66.00 | 77.00 | 91.00 | 131.25 | 131.67 | 145.00 | 128.00 | 145.67 | 108.33 | 84.75 | 81.50 | 85.33 | 94.00 | 99.22 | 48.16 |
| CVs | 123.00 | 135.75 | 135.00 | 146.50 | 178.67 | 165.33 | 139.50 | 153.75 | 125.50 | 77.75 | 101.67 | 108.67 | 135.33 | 129.33 | 97.33 | 77.00 | 95.00 | 69.67 | 52.75 | 42.75 | 85.25 | 74.50 | 65.67 | 56.00 | 99.50 | 132.33 | 112.67 | 92.00 | 89.75 | 103.33 | 109.50 | 106.80 | 51.84 |
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