Statistics of sunspot activity
October, 1990
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 | 129.63 | 168.20 | 200.57 | 165.57 | 179.00 | 167.50 | 168.83 | 211.50 | 192.00 | 192.00 | 273.50 | 262.17 | 287.33 | 243.60 | 321.83 | 293.00 | 197.33 | 234.43 | 236.40 | 216.67 | 174.75 | 175.80 | 170.50 | 144.20 | 164.50 | 137.17 | 121.60 | 131.50 | 119.29 | 118.86 | 100.67 | 190.32 | 100 |
| Wn | 34.63 | 55.80 | 84.57 | 82.29 | 84.71 | 62.67 | 69.50 | 81.67 | 82.83 | 89.00 | 119.83 | 112.67 | 121.83 | 110.40 | 149.67 | 140.33 | 98.83 | 113.71 | 116.80 | 110.67 | 106.25 | 96.40 | 90.67 | 73.40 | 87.50 | 80.83 | 65.60 | 54.17 | 47.86 | 46.00 | 22.67 | 86.90 | 45.66 |
| Ws | 95.00 | 112.40 | 116.00 | 83.29 | 94.29 | 104.83 | 99.33 | 129.83 | 109.17 | 103.00 | 153.67 | 149.50 | 165.50 | 133.20 | 172.17 | 152.67 | 98.50 | 120.71 | 119.60 | 106.00 | 68.50 | 79.40 | 79.83 | 70.80 | 77.00 | 56.33 | 56.00 | 77.33 | 71.43 | 72.86 | 78.00 | 103.42 | 54.34 |
| n | 6.75 | 8.00 | 10.14 | 9.00 | 8.86 | 9.33 | 10.50 | 12.67 | 12.33 | 12.00 | 15.00 | 14.67 | 15.67 | 12.80 | 14.83 | 13.67 | 10.00 | 12.29 | 14.20 | 12.00 | 10.25 | 11.00 | 11.00 | 8.20 | 7.25 | 6.50 | 6.40 | 6.67 | 6.14 | 6.43 | 5.83 | 10.33 | 100 |
| A | 1.25 | 2.00 | 1.29 | 0.86 | 2.00 | 1.50 | 1.67 | 0.83 | 1.17 | 0.33 | 2.50 | 2.17 | 2.00 | 0.40 | 2.67 | 1.50 | 0.67 | 1.14 | 1.80 | 1.67 | 2.25 | 5.00 | 4.00 | 2.60 | 2.25 | 1.67 | 1.00 | 1.00 | 1.43 | 1.29 | 1.00 | 1.71 | 16.51 |
| B | 2.25 | 1.60 | 2.43 | 1.43 | 1.00 | 2.17 | 1.50 | 1.67 | 1.00 | 1.33 | 1.83 | 1.67 | 3.00 | 1.80 | 2.17 | 2.33 | 0.67 | 1.00 | 1.80 | 1.33 | 0.75 | 0.80 | 1.17 | 1.00 | 1.00 | 0.50 | 2.00 | 1.17 | 0.86 | 0.43 | 0.17 | 1.41 | 13.67 |
| C | 0.50 | 1.00 | 2.43 | 2.14 | 1.29 | 1.67 | 2.83 | 4.00 | 3.50 | 3.17 | 3.17 | 4.67 | 2.00 | 1.00 | 1.83 | 2.50 | 1.67 | 1.43 | 0.80 | 1.67 | 1.00 | 0.80 | 1.17 | 0.60 | 0.75 | 0.67 | 0.40 | 0.50 | 0.43 | 1.00 | 1.50 | 1.68 | 16.25 |
| D | 1.88 | 2.40 | 3.00 | 3.71 | 3.57 | 3.33 | 2.50 | 2.17 | 2.33 | 2.50 | 2.33 | 2.50 | 3.50 | 4.20 | 3.67 | 1.67 | 1.00 | 1.86 | 2.00 | 1.67 | 0.50 | 0.80 | 0.67 | 1.60 | 1.00 | 1.17 | 0.60 | 1.67 | 2.71 | 1.86 | 2.00 | 2.14 | 20.71 |
| E | 0.13 | 0.20 | 0.43 | 0.43 | 0.00 | 0.00 | 0.17 | 0.50 | 0.33 | 0.67 | 0.50 | 0.17 | 0.00 | 0.40 | 0.83 | 1.50 | 0.50 | 0.57 | 0.80 | 0.00 | 0.50 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.20 | 0.17 | 0.14 | 0.43 | 0.33 | 0.33 | 3.15 |
| F | 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 | 0.00 | 0.00 | 0.14 | 0.40 | 0.00 | 0.25 | 0.00 | 0.17 | 0.00 | 0.50 | 0.33 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 0.67 |
| G | 0.38 | 0.20 | 0.14 | 0.00 | 0.71 | 0.33 | 0.67 | 0.33 | 1.17 | 0.67 | 1.50 | 0.83 | 0.67 | 0.80 | 0.67 | 0.33 | 1.50 | 1.57 | 1.20 | 2.00 | 1.75 | 1.60 | 1.50 | 1.20 | 0.75 | 1.00 | 1.20 | 1.50 | 0.43 | 0.57 | 0.33 | 0.89 | 8.58 |
| H | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 1.17 | 0.17 | 0.50 | 0.50 | 0.33 | 1.00 | 0.80 | 0.50 | 0.00 | 0.50 | 0.71 | 1.40 | 1.33 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.31 | 3.01 |
| I | 0.38 | 0.60 | 0.43 | 0.29 | 0.29 | 0.33 | 1.17 | 2.00 | 2.67 | 2.67 | 2.67 | 2.33 | 3.50 | 3.40 | 2.50 | 3.83 | 3.50 | 3.86 | 4.00 | 2.33 | 3.00 | 2.00 | 2.33 | 1.00 | 1.00 | 1.17 | 0.80 | 0.33 | 0.14 | 0.86 | 0.50 | 1.80 | 17.44 |
| x | 3.50 | 3.60 | 3.71 | 2.29 | 3.00 | 3.67 | 3.17 | 2.50 | 2.17 | 1.67 | 4.33 | 3.83 | 5.00 | 2.20 | 4.83 | 3.83 | 1.33 | 2.14 | 3.60 | 3.00 | 3.00 | 5.80 | 5.17 | 3.60 | 3.25 | 2.17 | 3.00 | 2.17 | 2.29 | 1.71 | 1.17 | 3.12 | 30.18 |
| r | 0.00 | 0.00 | 0.43 | 0.43 | 0.00 | 0.17 | 1.17 | 0.67 | 0.17 | 0.67 | 1.17 | 1.00 | 0.67 | 0.80 | 0.50 | 0.50 | 0.17 | 0.43 | 0.60 | 0.00 | 1.25 | 0.20 | 0.33 | 0.20 | 0.25 | 0.33 | 0.60 | 0.50 | 0.43 | 1.43 | 0.33 | 0.50 | 4.80 |
| s | 1.38 | 1.40 | 1.14 | 1.71 | 1.43 | 1.33 | 2.50 | 2.83 | 3.67 | 4.33 | 3.33 | 3.83 | 2.83 | 4.20 | 2.00 | 3.83 | 2.67 | 2.71 | 3.80 | 2.67 | 3.00 | 2.80 | 2.00 | 2.80 | 1.50 | 1.33 | 1.00 | 1.00 | 0.57 | 0.57 | 1.17 | 2.30 | 22.27 |
| a | 0.88 | 1.20 | 2.57 | 2.00 | 3.00 | 2.33 | 1.83 | 4.50 | 4.17 | 2.83 | 3.00 | 2.67 | 3.50 | 2.80 | 3.83 | 2.83 | 3.50 | 4.86 | 3.60 | 4.00 | 2.25 | 2.00 | 3.00 | 1.20 | 0.75 | 1.67 | 1.20 | 1.67 | 1.71 | 1.86 | 2.17 | 2.56 | 24.78 |
| h | 0.00 | 0.00 | 0.14 | 0.57 | 0.29 | 0.33 | 0.83 | 1.17 | 1.33 | 0.67 | 1.17 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.17 | 0.29 | 1.00 | 0.33 | 0.50 | 0.00 | 0.17 | 0.20 | 0.25 | 0.17 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.34 | 3.30 |
| k | 1.00 | 1.80 | 2.14 | 2.00 | 1.14 | 1.50 | 1.00 | 1.00 | 0.83 | 1.83 | 2.00 | 3.00 | 3.33 | 2.80 | 3.67 | 2.67 | 2.17 | 1.86 | 1.60 | 2.00 | 0.25 | 0.20 | 0.33 | 0.20 | 1.25 | 0.83 | 0.60 | 1.00 | 1.14 | 0.86 | 1.00 | 1.52 | 14.67 |
| x | 1.63 | 2.60 | 1.71 | 1.29 | 2.29 | 1.83 | 2.83 | 4.00 | 4.00 | 3.50 | 5.67 | 4.83 | 6.50 | 4.60 | 5.67 | 5.33 | 4.67 | 5.71 | 7.20 | 5.33 | 5.50 | 7.00 | 6.33 | 3.60 | 3.25 | 2.83 | 1.80 | 1.67 | 1.57 | 2.14 | 1.50 | 3.82 | 36.95 |
| o | 4.13 | 4.20 | 7.29 | 6.57 | 6.57 | 7.33 | 7.50 | 7.83 | 7.67 | 7.17 | 8.17 | 8.50 | 8.17 | 6.40 | 6.50 | 5.33 | 4.50 | 5.71 | 5.80 | 6.67 | 4.00 | 4.00 | 4.50 | 4.00 | 3.00 | 2.67 | 4.20 | 4.33 | 3.86 | 3.57 | 4.00 | 5.62 | 54.35 |
| i | 1.00 | 1.20 | 1.14 | 1.14 | 0.00 | 0.17 | 0.17 | 0.83 | 0.67 | 1.33 | 1.17 | 1.33 | 1.00 | 1.80 | 2.67 | 3.00 | 0.83 | 0.71 | 1.20 | 0.00 | 0.75 | 0.00 | 0.17 | 0.60 | 1.00 | 1.00 | 0.40 | 0.67 | 0.71 | 0.71 | 0.33 | 0.89 | 8.65 |
| 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 | 0.14 | 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 | 0.04 |
| CV | 93.38 | 123.20 | 159.14 | 178.00 | 140.43 | 143.00 | 154.67 | 191.00 | 201.50 | 212.33 | 235.83 | 230.67 | 244.17 | 240.20 | 251.83 | 213.33 | 177.83 | 198.86 | 227.00 | 194.00 | 126.75 | 91.20 | 98.83 | 99.60 | 108.75 | 98.67 | 76.80 | 118.33 | 102.00 | 91.57 | 97.67 | 158.73 | 100 |
| CVn | 8.50 | 19.00 | 44.71 | 50.71 | 42.57 | 33.00 | 56.33 | 79.17 | 65.83 | 79.50 | 101.50 | 108.67 | 100.33 | 97.20 | 114.83 | 83.17 | 86.17 | 101.71 | 132.00 | 101.33 | 66.50 | 58.60 | 62.50 | 39.20 | 49.25 | 43.67 | 36.40 | 40.17 | 30.14 | 19.57 | 15.33 | 63.47 | 39.99 |
| CVs | 84.88 | 104.20 | 114.43 | 127.29 | 97.86 | 110.00 | 98.33 | 111.83 | 135.67 | 132.83 | 134.33 | 122.00 | 143.83 | 143.00 | 137.00 | 130.17 | 91.67 | 97.14 | 95.00 | 92.67 | 60.25 | 32.60 | 36.33 | 60.40 | 59.50 | 55.00 | 40.40 | 78.17 | 71.86 | 72.00 | 82.33 | 95.26 | 60.01 |
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