Statistics of sunspot activity
October, 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 | 296.00 | 215.00 | 193.75 | 194.75 | 149.50 | 151.67 | 149.25 | 117.00 | 91.25 | 141.75 | 158.75 | 174.00 | 154.50 | 156.75 | 156.50 | 165.25 | 174.25 | 177.67 | 215.50 | 230.00 | 216.00 | 205.00 | 211.25 | 204.50 | 217.50 | 237.00 | 211.75 | 200.75 | 208.50 | 189.00 | 186.67 | 185.52 | 100 |
| Wn | 152.50 | 123.25 | 111.25 | 86.75 | 36.75 | 30.33 | 23.50 | 22.00 | 12.00 | 48.00 | 66.25 | 80.67 | 73.25 | 92.00 | 107.00 | 119.25 | 120.75 | 118.33 | 130.25 | 140.00 | 119.67 | 118.00 | 124.50 | 100.50 | 111.50 | 143.67 | 140.50 | 137.25 | 159.00 | 156.25 | 177.67 | 102.66 | 55.34 |
| Ws | 143.50 | 91.75 | 82.50 | 108.00 | 112.75 | 121.33 | 125.75 | 95.00 | 79.25 | 93.75 | 92.50 | 93.33 | 81.25 | 64.75 | 49.50 | 46.00 | 53.50 | 59.33 | 85.25 | 90.00 | 96.33 | 87.00 | 86.75 | 104.00 | 106.00 | 93.33 | 71.25 | 63.50 | 49.50 | 32.75 | 9.00 | 82.85 | 44.66 |
| n | 16.00 | 13.50 | 13.50 | 14.25 | 11.00 | 9.67 | 9.75 | 8.00 | 6.25 | 9.75 | 10.00 | 10.33 | 9.00 | 9.25 | 9.50 | 8.25 | 9.50 | 9.00 | 10.00 | 12.00 | 11.33 | 11.00 | 12.25 | 10.00 | 11.00 | 12.00 | 10.50 | 11.00 | 10.00 | 7.75 | 7.00 | 10.40 | 100 |
| A | 1.00 | 1.00 | 0.50 | 1.75 | 1.50 | 0.00 | 1.00 | 1.00 | 0.00 | 1.50 | 1.00 | 0.67 | 0.00 | 1.00 | 1.25 | 0.00 | 1.50 | 0.00 | 0.00 | 0.33 | 0.33 | 0.67 | 2.75 | 0.75 | 0.00 | 0.67 | 0.00 | 0.50 | 0.50 | 0.75 | 0.67 | 0.73 | 7.01 |
| B | 0.50 | 0.75 | 1.50 | 1.25 | 0.00 | 1.00 | 0.75 | 0.33 | 0.00 | 1.25 | 1.00 | 0.33 | 0.75 | 0.75 | 0.75 | 0.50 | 1.25 | 0.00 | 0.75 | 0.33 | 0.00 | 1.33 | 0.50 | 1.00 | 0.00 | 0.00 | 1.00 | 0.75 | 1.25 | 1.00 | 1.33 | 0.71 | 6.80 |
| C | 3.00 | 2.50 | 2.50 | 3.75 | 1.75 | 2.00 | 1.25 | 1.00 | 2.75 | 3.00 | 2.00 | 2.00 | 1.50 | 1.50 | 2.25 | 1.00 | 0.75 | 1.33 | 1.75 | 1.33 | 2.00 | 3.33 | 3.50 | 2.00 | 2.00 | 2.00 | 1.75 | 0.75 | 0.75 | 0.50 | 1.00 | 1.89 | 18.15 |
| D | 3.50 | 3.75 | 3.75 | 3.25 | 3.50 | 1.33 | 2.50 | 2.33 | 1.75 | 1.75 | 2.50 | 3.33 | 2.25 | 1.25 | 1.50 | 1.75 | 1.75 | 2.00 | 2.00 | 4.33 | 4.00 | 2.33 | 2.25 | 3.25 | 5.50 | 4.67 | 3.25 | 3.50 | 1.75 | 1.00 | 0.33 | 2.64 | 25.41 |
| E | 2.50 | 1.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 1.00 | 0.25 | 0.50 | 1.00 | 0.75 | 1.33 | 1.75 | 1.33 | 0.67 | 0.67 | 0.00 | 0.25 | 0.50 | 0.67 | 1.50 | 1.75 | 1.25 | 1.75 | 2.33 | 0.76 | 7.32 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.67 | 0.75 | 0.25 | 0.25 | 0.25 | 0.75 | 0.67 | 0.50 | 0.00 | 0.33 | 0.33 | 0.50 | 1.00 | 0.50 | 0.67 | 0.25 | 0.25 | 0.25 | 0.00 | 0.00 | 0.28 | 2.69 |
| G | 1.00 | 0.25 | 0.50 | 0.50 | 0.50 | 1.00 | 1.00 | 0.33 | 0.00 | 0.50 | 1.50 | 1.33 | 0.25 | 1.50 | 1.25 | 1.75 | 2.50 | 2.00 | 1.75 | 2.00 | 1.33 | 1.33 | 0.75 | 0.25 | 0.50 | 0.67 | 1.00 | 0.00 | 0.50 | 0.25 | 0.67 | 0.92 | 8.89 |
| H | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.67 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.75 | 0.00 | 0.00 | 0.10 | 0.96 |
| I | 4.50 | 3.75 | 4.75 | 3.75 | 3.75 | 3.33 | 3.00 | 3.00 | 1.75 | 1.50 | 1.50 | 2.00 | 2.50 | 2.75 | 1.75 | 2.00 | 0.25 | 1.00 | 1.50 | 2.33 | 2.67 | 1.00 | 1.75 | 1.50 | 2.00 | 2.67 | 1.50 | 3.50 | 3.00 | 2.50 | 0.67 | 2.37 | 22.78 |
| x | 1.50 | 1.75 | 2.00 | 3.00 | 1.50 | 1.00 | 1.75 | 1.33 | 0.00 | 2.75 | 2.00 | 1.00 | 0.75 | 1.75 | 2.00 | 0.50 | 2.75 | 0.00 | 0.75 | 0.67 | 0.33 | 2.00 | 3.25 | 1.75 | 0.00 | 0.67 | 1.00 | 1.25 | 1.75 | 1.75 | 2.00 | 1.44 | 13.81 |
| r | 0.00 | 1.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.50 | 1.00 | 0.25 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.19 | 1.86 |
| s | 6.00 | 4.75 | 5.25 | 8.25 | 6.25 | 3.00 | 2.50 | 2.67 | 3.75 | 3.25 | 3.50 | 5.33 | 4.50 | 3.75 | 2.50 | 3.25 | 1.75 | 3.00 | 3.00 | 6.00 | 5.00 | 3.33 | 2.25 | 2.75 | 5.50 | 5.33 | 3.75 | 2.75 | 2.25 | 2.50 | 1.67 | 3.85 | 37.02 |
| a | 6.50 | 4.00 | 5.75 | 3.00 | 2.50 | 4.33 | 4.50 | 3.33 | 2.25 | 3.75 | 3.50 | 2.67 | 2.75 | 2.25 | 3.00 | 3.25 | 3.75 | 3.67 | 4.50 | 4.67 | 4.33 | 2.67 | 3.25 | 4.25 | 3.00 | 3.00 | 2.50 | 3.50 | 2.00 | 0.75 | 0.33 | 3.34 | 32.11 |
| h | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.00 | 0.06 | 0.59 |
| k | 2.00 | 1.50 | 0.25 | 0.00 | 0.50 | 1.33 | 0.75 | 0.67 | 0.25 | 0.00 | 0.75 | 1.00 | 1.00 | 0.75 | 1.00 | 1.00 | 1.00 | 1.67 | 1.75 | 0.67 | 1.67 | 2.33 | 2.50 | 1.25 | 2.50 | 3.00 | 3.00 | 3.50 | 3.75 | 2.75 | 3.00 | 1.52 | 14.61 |
| x | 5.50 | 5.00 | 5.25 | 5.50 | 5.25 | 4.00 | 4.25 | 4.00 | 1.75 | 3.00 | 2.50 | 2.67 | 2.50 | 3.75 | 3.00 | 2.00 | 1.75 | 1.67 | 1.50 | 2.67 | 3.00 | 1.67 | 4.75 | 2.25 | 2.00 | 3.33 | 1.75 | 4.00 | 4.25 | 3.25 | 1.33 | 3.20 | 30.74 |
| o | 7.50 | 6.75 | 7.75 | 8.25 | 5.75 | 5.33 | 5.50 | 3.67 | 4.25 | 5.75 | 6.75 | 7.00 | 4.75 | 4.75 | 5.75 | 5.00 | 6.25 | 5.33 | 6.00 | 8.00 | 7.00 | 7.33 | 5.75 | 5.50 | 6.50 | 5.33 | 5.75 | 3.50 | 3.50 | 2.25 | 3.33 | 5.67 | 54.55 |
| i | 1.50 | 1.00 | 0.50 | 0.50 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.75 | 0.75 | 0.67 | 1.50 | 0.75 | 0.75 | 0.75 | 1.50 | 2.00 | 2.25 | 1.00 | 1.00 | 2.00 | 1.75 | 1.75 | 2.00 | 2.00 | 1.50 | 3.00 | 1.25 | 1.25 | 1.33 | 1.14 | 10.96 |
| c | 1.50 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.25 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.25 | 0.33 | 0.33 | 0.00 | 0.00 | 0.50 | 0.50 | 1.33 | 1.50 | 0.50 | 1.00 | 1.00 | 1.00 | 0.39 | 3.75 |
| CV | 285.50 | 218.75 | 163.50 | 166.00 | 162.75 | 144.00 | 129.75 | 110.67 | 90.00 | 103.00 | 149.75 | 184.67 | 164.25 | 138.25 | 136.25 | 163.25 | 164.75 | 214.00 | 210.50 | 229.33 | 226.67 | 213.33 | 185.75 | 173.75 | 260.00 | 282.67 | 262.75 | 247.25 | 234.75 | 172.50 | 175.33 | 185.92 | 100 |
| CVn | 112.00 | 98.25 | 81.00 | 62.00 | 25.75 | 18.33 | 16.75 | 13.00 | 10.50 | 18.50 | 78.75 | 115.67 | 93.00 | 85.50 | 103.25 | 122.25 | 112.00 | 140.33 | 136.50 | 129.67 | 117.00 | 112.67 | 86.00 | 77.50 | 119.00 | 170.67 | 152.00 | 157.75 | 170.75 | 158.75 | 174.33 | 99.01 | 53.25 |
| CVs | 173.50 | 120.50 | 82.50 | 104.00 | 137.00 | 125.67 | 113.00 | 97.67 | 79.50 | 84.50 | 71.00 | 69.00 | 71.25 | 52.75 | 33.00 | 41.00 | 52.75 | 73.67 | 74.00 | 99.67 | 109.67 | 100.67 | 99.75 | 96.25 | 141.00 | 112.00 | 110.75 | 89.50 | 64.00 | 13.75 | 1.00 | 86.91 | 46.75 |
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