Statistics of sunspot activity
August, 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 | 179.71 | 201.00 | 194.80 | 172.20 | 179.00 | 139.60 | 149.83 | 188.00 | 188.00 | 209.71 | 192.00 | 197.33 | 231.40 | 314.17 | 276.86 | 291.00 | 341.14 | 326.00 | 366.17 | 280.63 | 284.86 | 309.71 | 352.00 | 357.86 | 325.00 | 291.67 | 218.71 | 195.29 | 238.17 | 238.57 | 208.50 | 246.42 | 100 |
| Wn | 82.29 | 122.33 | 125.00 | 96.00 | 89.67 | 69.80 | 75.00 | 101.83 | 100.43 | 114.43 | 109.00 | 129.17 | 142.00 | 187.00 | 170.57 | 185.86 | 204.86 | 195.57 | 185.17 | 116.25 | 89.14 | 86.86 | 92.00 | 89.43 | 83.67 | 84.67 | 68.57 | 67.14 | 94.00 | 97.43 | 99.83 | 114.68 | 46.54 |
| Ws | 97.43 | 78.67 | 69.80 | 76.20 | 89.33 | 69.80 | 74.83 | 86.17 | 87.57 | 95.29 | 83.00 | 68.17 | 89.40 | 127.17 | 106.29 | 105.14 | 136.29 | 130.43 | 181.00 | 164.38 | 195.71 | 222.86 | 260.00 | 268.43 | 241.33 | 207.00 | 150.14 | 128.14 | 144.17 | 141.14 | 108.67 | 131.74 | 53.46 |
| n | 11.00 | 13.17 | 11.20 | 10.60 | 11.00 | 8.80 | 9.00 | 11.33 | 11.57 | 12.86 | 12.57 | 12.50 | 11.80 | 16.50 | 14.57 | 15.00 | 17.29 | 17.57 | 17.67 | 13.75 | 13.57 | 14.14 | 14.00 | 14.29 | 13.50 | 10.83 | 8.57 | 8.86 | 10.50 | 12.14 | 11.33 | 12.63 | 100 |
| A | 1.14 | 3.17 | 1.00 | 1.60 | 1.67 | 1.40 | 1.67 | 1.50 | 0.86 | 1.71 | 1.57 | 0.67 | 1.20 | 2.33 | 1.43 | 1.29 | 2.00 | 1.00 | 1.00 | 1.00 | 0.71 | 1.71 | 1.60 | 0.86 | 1.50 | 0.83 | 0.71 | 0.71 | 0.83 | 1.57 | 1.50 | 1.35 | 10.67 |
| B | 0.71 | 0.67 | 1.00 | 1.60 | 2.00 | 0.60 | 1.83 | 1.67 | 2.43 | 2.57 | 2.29 | 1.83 | 1.20 | 2.83 | 2.71 | 2.14 | 3.14 | 3.14 | 4.17 | 3.25 | 2.00 | 0.86 | 1.40 | 3.14 | 2.50 | 1.67 | 0.71 | 0.71 | 2.17 | 2.00 | 2.00 | 1.97 | 15.57 |
| C | 4.00 | 3.00 | 4.20 | 3.20 | 3.67 | 3.20 | 2.33 | 3.17 | 2.29 | 2.57 | 1.43 | 2.17 | 3.60 | 3.33 | 2.43 | 3.86 | 5.29 | 4.43 | 5.00 | 3.38 | 2.71 | 1.86 | 3.00 | 2.57 | 1.17 | 0.67 | 0.86 | 1.00 | 1.50 | 3.43 | 4.17 | 2.89 | 22.85 |
| D | 0.86 | 2.33 | 2.80 | 2.00 | 1.33 | 2.40 | 2.00 | 4.00 | 5.14 | 4.71 | 4.43 | 4.33 | 2.40 | 4.17 | 4.43 | 4.29 | 3.86 | 4.57 | 4.00 | 2.00 | 3.00 | 2.57 | 2.60 | 2.29 | 2.00 | 2.00 | 1.29 | 0.86 | 1.00 | 1.86 | 0.83 | 2.79 | 22.06 |
| E | 0.71 | 0.33 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 1.17 | 1.00 | 0.57 | 1.14 | 1.00 | 1.17 | 1.63 | 1.29 | 2.00 | 1.60 | 2.00 | 1.00 | 1.33 | 1.29 | 1.00 | 0.33 | 0.14 | 0.67 | 0.76 | 6.00 |
| 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 | 0.29 | 0.43 | 0.14 | 0.14 | 0.17 | 0.50 | 0.14 | 0.14 | 0.40 | 0.29 | 1.33 | 1.00 | 1.00 | 0.86 | 1.00 | 1.00 | 0.33 | 0.30 | 2.34 |
| G | 0.29 | 0.67 | 0.20 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.86 | 0.67 | 1.00 | 0.50 | 0.14 | 0.14 | 0.57 | 0.71 | 1.33 | 1.25 | 2.14 | 2.00 | 1.40 | 1.71 | 1.83 | 1.50 | 1.71 | 2.00 | 2.67 | 1.14 | 0.17 | 0.90 | 7.10 |
| H | 0.71 | 0.00 | 0.00 | 0.20 | 0.33 | 0.20 | 0.00 | 0.17 | 0.29 | 0.00 | 0.00 | 0.00 | 0.20 | 1.17 | 1.43 | 1.14 | 0.57 | 1.14 | 0.17 | 0.13 | 0.71 | 1.29 | 1.60 | 1.00 | 1.17 | 1.00 | 0.14 | 0.00 | 0.17 | 0.00 | 0.00 | 0.48 | 3.81 |
| I | 2.57 | 3.00 | 1.20 | 1.80 | 2.00 | 1.00 | 1.17 | 0.83 | 0.57 | 0.29 | 2.00 | 2.50 | 1.20 | 1.00 | 0.71 | 1.14 | 0.57 | 1.43 | 0.67 | 0.63 | 0.86 | 1.71 | 0.40 | 0.43 | 1.00 | 0.83 | 0.86 | 1.71 | 0.83 | 1.00 | 1.67 | 1.21 | 9.60 |
| x | 1.86 | 3.83 | 2.00 | 3.20 | 3.67 | 2.00 | 3.50 | 3.17 | 3.29 | 4.29 | 3.86 | 2.50 | 2.40 | 5.17 | 4.14 | 3.43 | 5.14 | 4.14 | 5.17 | 4.25 | 2.71 | 2.57 | 3.00 | 4.00 | 4.00 | 2.50 | 1.43 | 1.43 | 3.00 | 3.57 | 3.50 | 3.31 | 26.24 |
| r | 0.00 | 0.33 | 0.80 | 0.40 | 1.00 | 0.60 | 0.00 | 0.50 | 0.71 | 0.71 | 0.43 | 1.00 | 1.20 | 1.50 | 1.00 | 0.86 | 1.29 | 0.86 | 0.83 | 0.38 | 0.29 | 0.29 | 0.80 | 0.71 | 0.50 | 0.17 | 0.29 | 0.14 | 0.33 | 0.57 | 0.67 | 0.62 | 4.89 |
| s | 3.71 | 2.67 | 1.20 | 2.40 | 1.67 | 1.20 | 0.83 | 1.67 | 2.00 | 2.29 | 2.29 | 3.83 | 1.60 | 1.67 | 4.57 | 3.14 | 2.71 | 2.86 | 1.83 | 2.25 | 1.29 | 2.86 | 0.80 | 1.71 | 1.50 | 0.67 | 0.86 | 1.43 | 1.00 | 1.14 | 1.67 | 1.98 | 15.66 |
| a | 3.29 | 4.17 | 4.20 | 2.00 | 3.00 | 3.60 | 3.83 | 4.67 | 4.00 | 4.14 | 5.00 | 5.00 | 6.40 | 6.50 | 2.57 | 4.86 | 5.29 | 6.00 | 5.33 | 3.75 | 4.71 | 2.57 | 2.80 | 2.14 | 2.67 | 2.50 | 2.00 | 3.00 | 2.50 | 4.71 | 4.50 | 3.93 | 31.09 |
| h | 0.57 | 0.33 | 0.00 | 0.60 | 0.33 | 0.20 | 0.17 | 0.50 | 0.14 | 0.29 | 0.29 | 0.00 | 0.20 | 1.00 | 0.57 | 0.71 | 0.71 | 1.43 | 0.83 | 0.25 | 0.86 | 1.43 | 1.40 | 0.43 | 0.17 | 0.50 | 0.00 | 0.00 | 0.83 | 0.14 | 0.00 | 0.48 | 3.80 |
| k | 1.57 | 1.83 | 3.00 | 2.00 | 1.33 | 1.20 | 0.67 | 0.83 | 1.43 | 1.14 | 0.71 | 0.17 | 0.00 | 0.67 | 1.71 | 2.00 | 2.14 | 2.29 | 3.67 | 2.88 | 3.71 | 4.43 | 5.20 | 5.29 | 4.67 | 4.50 | 4.00 | 2.86 | 2.83 | 2.00 | 1.00 | 2.31 | 18.32 |
| x | 4.43 | 6.17 | 2.20 | 3.60 | 4.00 | 2.60 | 2.83 | 2.50 | 1.71 | 2.00 | 3.57 | 3.17 | 2.60 | 4.50 | 3.57 | 3.57 | 3.14 | 3.57 | 1.83 | 1.75 | 2.29 | 4.71 | 3.60 | 2.29 | 3.67 | 2.67 | 1.71 | 2.43 | 1.83 | 2.57 | 3.17 | 3.04 | 24.08 |
| o | 5.57 | 6.67 | 7.80 | 6.80 | 7.00 | 6.00 | 6.17 | 8.50 | 9.29 | 10.14 | 8.43 | 8.33 | 7.20 | 8.33 | 9.14 | 10.00 | 11.57 | 11.00 | 12.50 | 9.38 | 9.43 | 7.00 | 8.20 | 9.43 | 7.00 | 5.67 | 4.43 | 4.57 | 7.17 | 8.43 | 7.00 | 8.00 | 63.38 |
| i | 1.00 | 0.33 | 1.20 | 0.20 | 0.00 | 0.20 | 0.00 | 0.33 | 0.57 | 0.57 | 0.57 | 1.00 | 2.00 | 3.67 | 1.86 | 1.29 | 2.43 | 3.00 | 3.33 | 2.63 | 1.71 | 1.86 | 2.00 | 2.00 | 2.50 | 2.50 | 2.43 | 1.29 | 0.67 | 0.14 | 0.50 | 1.41 | 11.18 |
| c | 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 | 0.14 | 0.14 | 0.00 | 0.00 | 0.00 | 0.14 | 0.57 | 0.20 | 0.57 | 0.33 | 0.00 | 0.00 | 0.57 | 0.83 | 1.00 | 0.67 | 0.17 | 1.36 |
| CV | 170.57 | 179.83 | 196.40 | 164.60 | 129.67 | 125.00 | 99.17 | 158.17 | 178.71 | 188.71 | 168.43 | 160.67 | 142.80 | 225.67 | 245.14 | 249.43 | 266.43 | 310.00 | 320.83 | 245.50 | 300.29 | 355.00 | 349.80 | 331.00 | 296.67 | 276.33 | 229.86 | 201.00 | 232.33 | 189.00 | 127.00 | 219.81 | 100 |
| CVn | 107.86 | 122.00 | 132.60 | 109.60 | 99.67 | 83.00 | 64.67 | 100.33 | 121.57 | 137.43 | 121.29 | 122.83 | 95.20 | 141.33 | 167.71 | 166.29 | 177.71 | 189.00 | 157.33 | 106.88 | 86.43 | 81.57 | 79.20 | 65.14 | 55.00 | 76.67 | 61.14 | 61.29 | 72.00 | 69.29 | 78.83 | 106.80 | 48.59 |
| CVs | 62.71 | 57.83 | 63.80 | 55.00 | 30.00 | 42.00 | 34.50 | 57.83 | 57.14 | 51.29 | 47.14 | 37.83 | 47.60 | 84.33 | 77.43 | 83.14 | 88.71 | 121.00 | 163.50 | 138.63 | 213.86 | 273.43 | 270.60 | 265.86 | 241.67 | 199.67 | 168.71 | 139.71 | 160.33 | 119.71 | 48.17 | 113.00 | 51.41 |
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