Statistics of sunspot activity
February, 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 | Average | % |
| W | 117.67 | 104.00 | 129.33 | 146.50 | 146.50 | 161.67 | 156.25 | 168.00 | 169.00 | 153.00 | 157.25 | 102.67 | 107.33 | 105.00 | 109.50 | 90.50 | 95.25 | 114.25 | 122.25 | 111.33 | 118.75 | 121.75 | 115.00 | 101.67 | 90.50 | 85.50 | 78.67 | 79.67 | 119.96 | 100 |
| Wn | 98.33 | 96.00 | 106.33 | 106.50 | 80.00 | 78.00 | 96.00 | 89.75 | 101.00 | 80.50 | 85.50 | 67.67 | 48.67 | 61.33 | 54.25 | 48.50 | 49.50 | 35.50 | 36.00 | 22.67 | 26.50 | 30.75 | 24.50 | 30.00 | 30.00 | 36.50 | 44.67 | 36.33 | 60.76 | 50.65 |
| Ws | 19.33 | 8.00 | 23.00 | 40.00 | 66.50 | 83.67 | 60.25 | 78.25 | 68.00 | 72.50 | 71.75 | 35.00 | 58.67 | 43.67 | 55.25 | 42.00 | 45.75 | 78.75 | 86.25 | 88.67 | 92.25 | 91.00 | 90.50 | 71.67 | 60.50 | 49.00 | 34.00 | 43.33 | 59.20 | 49.35 |
| n | 7.33 | 6.67 | 8.67 | 9.00 | 9.25 | 9.33 | 8.25 | 10.00 | 9.75 | 9.50 | 10.00 | 7.67 | 8.00 | 7.67 | 8.75 | 7.25 | 7.50 | 7.75 | 8.25 | 7.33 | 7.50 | 8.00 | 6.75 | 6.33 | 5.50 | 4.50 | 4.00 | 4.67 | 7.68 | 100 |
| A | 0.33 | 0.67 | 2.33 | 1.75 | 1.25 | 0.67 | 1.25 | 2.00 | 0.25 | 0.50 | 0.75 | 0.67 | 1.67 | 0.67 | 1.00 | 0.75 | 1.50 | 0.25 | 1.50 | 0.67 | 0.50 | 1.00 | 1.50 | 1.67 | 1.25 | 0.00 | 0.00 | 0.67 | 0.96 | 12.55 |
| B | 1.00 | 0.00 | 0.67 | 0.25 | 2.00 | 1.33 | 1.00 | 2.00 | 1.00 | 0.25 | 1.50 | 0.33 | 0.00 | 0.00 | 0.75 | 1.25 | 1.00 | 1.25 | 3.00 | 0.00 | 0.00 | 2.25 | 1.00 | 0.33 | 0.00 | 0.50 | 0.67 | 0.67 | 0.86 | 11.15 |
| C | 1.33 | 1.33 | 1.00 | 2.00 | 1.75 | 2.67 | 1.50 | 1.50 | 2.75 | 2.50 | 3.00 | 2.00 | 1.33 | 2.00 | 1.50 | 1.50 | 1.00 | 2.25 | 1.00 | 2.00 | 1.00 | 0.50 | 1.00 | 0.67 | 1.25 | 1.00 | 1.33 | 1.67 | 1.58 | 20.60 |
| D | 2.33 | 2.00 | 2.67 | 1.25 | 2.25 | 1.00 | 1.75 | 1.50 | 2.75 | 2.50 | 1.50 | 1.33 | 2.33 | 2.00 | 1.50 | 1.00 | 1.25 | 1.75 | 1.50 | 3.00 | 4.00 | 2.25 | 1.50 | 1.67 | 1.50 | 2.00 | 1.00 | 0.33 | 1.84 | 23.90 |
| E | 0.00 | 0.33 | 0.00 | 1.25 | 0.75 | 0.67 | 0.50 | 1.50 | 0.75 | 0.00 | 0.25 | 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 | 0.00 | 0.33 | 0.33 | 0.25 | 3.21 |
| F | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.00 | 0.25 | 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 | 0.00 | 0.00 | 0.03 | 0.35 |
| G | 1.67 | 1.00 | 1.33 | 0.50 | 0.75 | 2.33 | 2.00 | 1.25 | 1.75 | 1.50 | 0.75 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 0.50 | 0.00 | 0.00 | 0.00 | 0.65 | 8.48 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| I | 0.67 | 1.33 | 0.67 | 1.75 | 0.50 | 0.67 | 0.00 | 0.25 | 0.25 | 2.25 | 2.25 | 2.33 | 2.67 | 3.00 | 4.00 | 2.75 | 2.50 | 2.25 | 1.25 | 1.67 | 2.00 | 2.00 | 0.75 | 1.33 | 0.75 | 1.00 | 0.67 | 1.00 | 1.52 | 19.75 |
| x | 1.33 | 0.67 | 3.00 | 2.00 | 3.25 | 2.00 | 2.25 | 4.00 | 1.25 | 0.75 | 2.25 | 1.00 | 1.67 | 0.67 | 1.75 | 2.00 | 2.50 | 1.50 | 4.50 | 0.67 | 0.50 | 3.25 | 2.50 | 2.00 | 1.25 | 0.50 | 0.67 | 1.33 | 1.82 | 23.70 |
| r | 0.33 | 0.00 | 0.00 | 0.50 | 1.00 | 1.00 | 0.50 | 0.25 | 0.00 | 0.50 | 1.00 | 0.33 | 0.67 | 0.00 | 0.00 | 0.25 | 1.25 | 1.25 | 1.00 | 0.33 | 0.00 | 0.00 | 1.50 | 1.33 | 0.25 | 0.50 | 1.00 | 1.67 | 0.59 | 7.63 |
| s | 3.00 | 3.67 | 2.67 | 2.50 | 1.25 | 1.33 | 2.00 | 1.75 | 3.25 | 5.00 | 3.25 | 3.67 | 3.67 | 5.33 | 5.50 | 3.50 | 2.25 | 3.25 | 1.00 | 3.00 | 5.25 | 2.75 | 0.75 | 1.00 | 1.50 | 2.50 | 0.67 | 0.33 | 2.70 | 35.13 |
| a | 2.67 | 2.33 | 3.00 | 4.00 | 3.50 | 4.67 | 3.50 | 3.75 | 5.25 | 3.25 | 3.25 | 2.67 | 2.00 | 1.67 | 1.50 | 1.50 | 1.50 | 1.75 | 1.75 | 3.33 | 1.75 | 2.00 | 2.00 | 2.00 | 2.50 | 1.00 | 1.67 | 1.33 | 2.54 | 33.04 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 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 | 0.01 | 0.12 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.25 | 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 | 0.00 | 0.00 | 0.00 | 0.03 | 0.39 |
| x | 1.00 | 2.00 | 3.00 | 3.50 | 1.75 | 1.33 | 1.25 | 2.25 | 0.50 | 2.75 | 3.00 | 3.00 | 4.33 | 3.67 | 5.00 | 3.50 | 4.00 | 2.50 | 2.75 | 2.33 | 2.50 | 3.00 | 2.25 | 3.00 | 2.00 | 1.00 | 0.67 | 1.67 | 2.48 | 32.30 |
| o | 6.33 | 4.33 | 5.67 | 4.00 | 6.50 | 7.33 | 6.25 | 5.75 | 8.25 | 6.25 | 6.50 | 4.67 | 3.67 | 4.00 | 3.75 | 3.75 | 3.50 | 5.00 | 4.75 | 5.00 | 4.50 | 5.00 | 4.25 | 3.33 | 3.00 | 3.50 | 2.00 | 2.33 | 4.76 | 61.89 |
| i | 0.00 | 0.33 | 0.00 | 1.50 | 1.00 | 0.67 | 0.75 | 2.00 | 1.00 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.75 | 0.00 | 0.50 | 0.00 | 0.25 | 0.00 | 0.50 | 0.00 | 1.33 | 0.67 | 0.45 | 5.81 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CV | 108.33 | 104.33 | 107.67 | 106.50 | 106.75 | 120.33 | 114.25 | 122.75 | 150.00 | 133.00 | 110.25 | 92.00 | 87.33 | 95.67 | 89.75 | 63.25 | 61.50 | 75.00 | 54.25 | 94.33 | 122.50 | 75.25 | 62.50 | 60.00 | 66.75 | 63.00 | 45.33 | 33.33 | 90.21 | 100 |
| CVn | 86.33 | 103.67 | 105.33 | 86.00 | 68.25 | 61.00 | 69.25 | 69.50 | 92.75 | 70.75 | 57.50 | 59.33 | 51.00 | 55.00 | 57.00 | 42.75 | 38.00 | 25.25 | 12.50 | 18.33 | 32.00 | 29.00 | 19.75 | 20.00 | 20.75 | 22.00 | 23.00 | 19.67 | 50.56 | 56.05 |
| CVs | 22.00 | 0.67 | 2.33 | 20.50 | 38.50 | 59.33 | 45.00 | 53.25 | 57.25 | 62.25 | 52.75 | 32.67 | 36.33 | 40.67 | 32.75 | 20.50 | 23.50 | 49.75 | 41.75 | 76.00 | 90.50 | 46.25 | 42.75 | 40.00 | 46.00 | 41.00 | 22.33 | 13.67 | 39.65 | 43.95 |
|
