Statistics of sunspot activity
October, 1999
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 | 64.67 | 68.25 | 86.33 | 116.25 | 152.20 | 169.75 | 174.75 | 156.33 | | | | | 210.00 | 205.50 | 121.50 | | 188.00 | 132.00 | 165.50 | 186.00 | 135.33 | 131.33 | 107.50 | 131.00 | 165.75 | 190.25 | 185.75 | 191.67 | 203.67 | | 177.00 | 152.65 | 100 |
| Wn | 45.67 | 38.00 | 39.67 | 63.50 | 87.20 | 102.75 | 107.75 | 98.67 | | | | | 188.00 | 189.00 | 121.50 | | 177.00 | 96.00 | 130.00 | 140.50 | 80.67 | 52.33 | 21.50 | 34.50 | 49.00 | 52.50 | 65.25 | 76.33 | 77.67 | | 82.25 | 88.69 | 58.10 |
| Ws | 19.00 | 30.25 | 46.67 | 52.75 | 65.00 | 67.00 | 67.00 | 57.67 | | | | | 22.00 | 16.50 | 0.00 | | 11.00 | 36.00 | 35.50 | 45.50 | 54.67 | 79.00 | 86.00 | 96.50 | 116.75 | 137.75 | 120.50 | 115.33 | 126.00 | | 94.75 | 63.96 | 41.90 |
| n | 5.67 | 6.00 | 6.67 | 7.75 | 10.20 | 10.75 | 12.25 | 12.00 | | | | | 9.00 | 9.00 | 6.00 | | 7.00 | 9.00 | 6.50 | 8.50 | 6.33 | 6.33 | 4.50 | 5.00 | 6.25 | 7.50 | 8.50 | 9.00 | 8.67 | | 10.00 | 7.93 | 100 |
| A | 0.67 | 2.50 | 1.67 | 0.50 | 0.40 | 0.75 | 1.00 | 1.33 | | | | | 0.00 | 1.50 | 1.00 | | 1.00 | 3.00 | 1.00 | 0.50 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.75 | 1.00 | 0.67 | 1.00 | | 0.75 | 0.87 | 10.91 |
| B | 0.33 | 0.00 | 1.67 | 1.25 | 1.00 | 1.00 | 2.00 | 0.67 | | | | | 2.00 | 0.50 | 0.00 | | 1.00 | 1.00 | 1.00 | 2.50 | 0.33 | 0.00 | 0.25 | 0.00 | 1.00 | 1.50 | 0.75 | 2.33 | 1.33 | | 0.75 | 0.97 | 12.18 |
| C | 1.67 | 0.50 | 2.00 | 2.25 | 1.60 | 3.00 | 3.50 | 2.67 | | | | | 1.00 | 1.50 | 1.50 | | 0.00 | 2.00 | 1.50 | 2.00 | 1.00 | 2.00 | 0.75 | 0.75 | 1.00 | 0.00 | 1.00 | 2.00 | 1.67 | | 1.25 | 1.52 | 19.21 |
| D | 0.00 | 0.00 | 0.00 | 1.25 | 3.60 | 2.25 | 2.25 | 2.00 | | | | | 1.00 | 1.50 | 0.00 | | 1.00 | 0.00 | 0.50 | 1.00 | 1.33 | 1.00 | 0.50 | 0.75 | 0.00 | 0.00 | 0.50 | 0.33 | 1.67 | | 2.50 | 1.00 | 12.57 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | 0.00 | 1.00 | 0.00 | | 0.00 | 1.00 | 0.50 | 1.00 | 1.67 | 2.00 | 1.00 | 1.50 | 0.75 | 1.00 | 0.75 | 1.00 | 1.33 | | 0.50 | 0.60 | 7.56 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | 0.00 | 0.50 | 1.00 | | 1.00 | 0.00 | 1.00 | 1.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.25 | 0.75 | 1.00 | 0.67 | 0.67 | | 0.00 | 0.33 | 4.12 |
| G | 0.00 | 0.00 | 0.33 | 1.00 | 1.20 | 0.75 | 0.25 | 0.00 | | | | | 2.00 | 1.00 | 2.00 | | 2.00 | 1.00 | 0.50 | 0.00 | 0.33 | 0.33 | 1.50 | 2.00 | 3.00 | 2.25 | 1.25 | 1.33 | 1.00 | | 3.25 | 1.13 | 14.26 |
| H | 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 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | 0.00 | 0.02 | 0.25 |
| I | 3.00 | 3.00 | 1.00 | 1.50 | 2.40 | 3.00 | 3.25 | 5.33 | | | | | 3.00 | 1.50 | 0.50 | | 1.00 | 1.00 | 0.50 | 0.50 | 1.33 | 0.33 | 0.00 | 0.00 | 0.25 | 1.25 | 2.25 | 0.67 | 0.00 | | 1.00 | 1.50 | 18.94 |
| x | 1.00 | 2.50 | 3.33 | 1.75 | 1.40 | 1.75 | 3.00 | 2.00 | | | | | 2.00 | 2.00 | 1.00 | | 2.00 | 4.00 | 2.00 | 3.00 | 0.33 | 0.67 | 0.25 | 0.00 | 1.00 | 2.25 | 1.75 | 3.00 | 2.33 | | 1.50 | 1.83 | 23.10 |
| r | 0.00 | 0.50 | 0.00 | 0.50 | 0.20 | 0.75 | 1.00 | 1.00 | | | | | 1.00 | 0.50 | 1.00 | | 2.00 | 0.00 | 0.50 | 0.50 | 0.67 | 0.33 | 0.00 | 0.25 | 0.50 | 0.00 | 0.25 | 1.33 | 0.00 | | 0.25 | 0.52 | 6.57 |
| s | 4.67 | 2.50 | 3.00 | 3.75 | 4.40 | 3.50 | 6.75 | 6.33 | | | | | 2.00 | 1.50 | 1.00 | | 0.00 | 4.00 | 1.00 | 1.00 | 1.67 | 2.00 | 0.75 | 1.00 | 1.25 | 1.25 | 3.25 | 1.00 | 1.00 | | 2.50 | 2.44 | 30.78 |
| a | 0.00 | 0.50 | 0.33 | 1.75 | 4.00 | 4.75 | 1.50 | 2.33 | | | | | 2.00 | 3.00 | 1.50 | | 2.00 | 0.00 | 2.00 | 3.00 | 3.33 | 3.00 | 1.50 | 1.50 | 1.25 | 1.75 | 2.00 | 2.00 | 3.67 | | 5.75 | 2.18 | 27.43 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | | | | | 1.00 | 0.00 | 0.50 | | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.25 | 0.25 | 0.00 | 0.00 | | 0.00 | 0.11 | 1.36 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | | | | | 1.00 | 2.00 | 1.00 | | 1.00 | 1.00 | 1.00 | 1.00 | 0.33 | 0.33 | 2.00 | 2.25 | 1.75 | 2.00 | 1.00 | 1.67 | 1.67 | | 0.00 | 0.85 | 10.75 |
| x | 3.67 | 5.50 | 2.67 | 2.00 | 2.80 | 3.75 | 4.25 | 6.67 | | | | | 3.00 | 3.00 | 1.50 | | 2.00 | 4.00 | 1.50 | 1.00 | 1.33 | 1.00 | 0.50 | 0.00 | 0.25 | 2.00 | 3.25 | 1.33 | 1.00 | | 1.75 | 2.39 | 30.10 |
| o | 2.00 | 0.50 | 4.00 | 5.50 | 7.40 | 6.25 | 8.00 | 5.33 | | | | | 6.00 | 4.50 | 3.50 | | 4.00 | 4.00 | 3.50 | 5.50 | 3.00 | 3.00 | 2.75 | 3.50 | 5.00 | 3.75 | 3.50 | 6.00 | 5.67 | | 7.75 | 4.56 | 57.42 |
| i | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.75 | 0.00 | 0.00 | | | | | 0.00 | 1.00 | 0.50 | | 0.00 | 0.00 | 0.50 | 2.00 | 2.00 | 2.33 | 1.25 | 1.25 | 0.50 | 0.75 | 1.00 | 1.67 | 1.33 | | 0.25 | 0.69 | 8.74 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | 0.00 | 0.50 | 0.50 | | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 1.00 | 0.75 | 0.00 | 0.67 | | 0.25 | 0.30 | 3.74 |
| CV | 49.67 | 33.50 | 45.00 | 88.75 | 149.00 | 117.00 | 125.25 | 129.33 | | | | | 153.00 | 164.50 | 125.50 | | 117.00 | 120.00 | 110.00 | 119.50 | 109.67 | 108.00 | 126.50 | 154.75 | 159.75 | 168.25 | 151.50 | 137.00 | 165.67 | | 156.00 | 123.36 | 100 |
| CVn | 38.33 | 24.75 | 21.67 | 40.25 | 74.20 | 50.50 | 64.75 | 91.67 | | | | | 136.00 | 157.00 | 125.50 | | 113.00 | 116.00 | 101.00 | 88.50 | 65.67 | 40.67 | 27.25 | 50.75 | 55.50 | 48.50 | 61.00 | 61.67 | 66.67 | | 55.00 | 71.03 | 57.58 |
| CVs | 11.33 | 8.75 | 23.33 | 48.50 | 74.80 | 66.50 | 60.50 | 37.67 | | | | | 17.00 | 7.50 | 0.00 | | 4.00 | 4.00 | 9.00 | 31.00 | 44.00 | 67.33 | 99.25 | 104.00 | 104.25 | 119.75 | 90.50 | 75.33 | 99.00 | | 101.00 | 52.33 | 42.42 |
|
