Statistics of sunspot activity
August, 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 | 94.75 | 105.25 | 127.25 | 171.50 | 203.75 | 161.50 | 164.50 | 165.50 | 154.67 | 136.50 | 146.00 | 181.00 | 136.75 | 130.25 | 157.00 | 159.33 | 153.00 | 145.67 | 131.75 | 146.25 | 148.00 | 155.25 | 180.25 | 152.50 | 115.50 | 130.50 | 148.00 | 167.00 | 134.00 | 139.00 | 130.25 | 147.50 | 100 |
| Wn | 53.50 | 59.75 | 69.75 | 93.50 | 102.25 | 73.25 | 79.75 | 83.75 | 84.33 | 74.00 | 62.00 | 78.50 | 40.25 | 35.25 | 61.50 | 69.33 | 61.50 | 73.67 | 76.25 | 96.75 | 99.00 | 113.50 | 118.00 | 83.75 | 49.50 | 45.00 | 58.00 | 73.75 | 63.00 | 65.00 | 66.00 | 73.01 | 49.50 |
| Ws | 41.25 | 45.50 | 57.50 | 78.00 | 101.50 | 88.25 | 84.75 | 81.75 | 70.33 | 62.50 | 84.00 | 102.50 | 96.50 | 95.00 | 95.50 | 90.00 | 91.50 | 72.00 | 55.50 | 49.50 | 49.00 | 41.75 | 62.25 | 68.75 | 66.00 | 85.50 | 90.00 | 93.25 | 71.00 | 74.00 | 64.25 | 74.49 | 50.50 |
| n | 6.00 | 5.75 | 7.00 | 8.25 | 9.50 | 8.50 | 9.25 | 9.50 | 9.00 | 9.00 | 8.75 | 10.50 | 7.75 | 8.00 | 11.00 | 13.00 | 12.50 | 10.00 | 8.75 | 8.50 | 8.67 | 8.00 | 8.50 | 8.25 | 5.75 | 6.50 | 8.00 | 9.25 | 6.75 | 6.50 | 5.25 | 8.45 | 100 |
| A | 1.00 | 0.00 | 0.25 | 0.25 | 0.75 | 0.25 | 0.75 | 0.50 | 0.67 | 2.50 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 2.00 | 1.25 | 0.00 | 0.50 | 0.75 | 1.00 | 0.50 | 0.25 | 1.50 | 0.25 | 0.25 | 0.25 | 0.50 | 0.00 | 0.00 | 0.00 | 0.55 | 6.46 |
| B | 1.00 | 0.50 | 0.50 | 0.75 | 1.50 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.50 | 1.00 | 1.33 | 1.25 | 0.33 | 0.00 | 1.00 | 0.67 | 0.50 | 0.50 | 0.25 | 0.50 | 0.25 | 0.25 | 0.00 | 0.50 | 0.50 | 0.00 | 0.46 | 5.47 |
| C | 0.25 | 1.00 | 1.50 | 2.00 | 1.00 | 1.50 | 1.50 | 1.00 | 1.00 | 1.00 | 1.75 | 4.50 | 1.75 | 2.25 | 1.50 | 2.67 | 3.50 | 1.33 | 1.75 | 0.25 | 0.33 | 0.50 | 1.50 | 2.00 | 0.25 | 0.00 | 0.50 | 1.00 | 0.50 | 0.00 | 0.25 | 1.28 | 15.21 |
| D | 2.00 | 2.75 | 3.50 | 5.00 | 3.50 | 4.00 | 2.75 | 2.75 | 3.67 | 3.00 | 4.25 | 4.00 | 2.25 | 1.75 | 3.50 | 1.67 | 0.75 | 4.00 | 2.75 | 2.50 | 1.33 | 1.50 | 1.75 | 1.25 | 0.75 | 2.00 | 2.75 | 4.25 | 2.50 | 1.50 | 1.00 | 2.61 | 30.89 |
| E | 0.25 | 0.00 | 0.25 | 0.00 | 1.00 | 1.00 | 1.25 | 0.75 | 0.33 | 0.00 | 0.25 | 0.00 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.50 | 0.25 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.50 | 0.27 | 3.18 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 1.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.75 | 0.75 | 0.50 | 0.32 | 3.79 |
| G | 1.50 | 1.50 | 0.75 | 0.25 | 0.75 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 0.50 | 1.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 1.50 | 1.00 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 1.00 | 1.25 | 1.00 | 0.47 | 5.60 |
| H | 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 | 0.33 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 0.25 | 0.00 | 0.07 | 0.80 |
| I | 0.00 | 0.00 | 0.25 | 0.00 | 1.00 | 1.75 | 2.25 | 4.00 | 2.67 | 1.50 | 2.00 | 2.00 | 2.00 | 2.75 | 4.50 | 4.33 | 5.75 | 4.33 | 3.50 | 3.75 | 4.33 | 2.25 | 2.75 | 1.75 | 2.25 | 3.00 | 3.25 | 2.25 | 1.00 | 1.75 | 2.00 | 2.42 | 28.60 |
| x | 2.00 | 0.50 | 0.75 | 1.00 | 2.25 | 0.25 | 1.25 | 0.50 | 0.67 | 2.50 | 0.25 | 0.00 | 1.00 | 0.50 | 1.00 | 3.33 | 2.50 | 0.33 | 0.50 | 1.75 | 1.67 | 1.00 | 0.75 | 1.75 | 0.75 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.00 | 1.01 | 11.93 |
| r | 0.25 | 0.50 | 0.75 | 0.25 | 0.25 | 0.00 | 0.25 | 0.25 | 0.33 | 0.50 | 0.00 | 1.00 | 0.25 | 0.00 | 0.50 | 0.67 | 1.00 | 2.00 | 0.25 | 0.25 | 0.33 | 0.00 | 0.25 | 1.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.25 | 0.37 | 4.33 |
| s | 2.00 | 2.50 | 3.25 | 2.50 | 2.75 | 2.50 | 2.50 | 3.00 | 4.33 | 4.00 | 4.25 | 3.50 | 3.50 | 4.25 | 5.00 | 6.33 | 6.25 | 4.33 | 4.00 | 3.75 | 2.67 | 2.50 | 3.25 | 3.00 | 1.75 | 1.75 | 3.75 | 2.75 | 1.75 | 1.25 | 1.00 | 3.22 | 38.15 |
| a | 1.75 | 2.25 | 2.25 | 4.00 | 3.25 | 4.00 | 3.25 | 4.50 | 2.33 | 2.00 | 3.75 | 5.50 | 2.50 | 2.50 | 4.50 | 2.67 | 2.75 | 3.00 | 3.75 | 2.25 | 3.00 | 2.75 | 2.75 | 1.50 | 2.25 | 3.25 | 2.75 | 4.50 | 2.75 | 2.25 | 2.50 | 3.00 | 35.51 |
| h | 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 | 0.00 | 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 | 0.50 | 0.00 | 0.00 | 0.04 | 0.48 |
| k | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 1.75 | 1.50 | 1.25 | 1.33 | 0.00 | 0.50 | 0.50 | 0.50 | 0.75 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.50 | 1.00 | 1.75 | 1.50 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.25 | 2.50 | 1.50 | 0.81 | 9.61 |
| x | 1.00 | 0.00 | 0.50 | 0.25 | 1.75 | 2.00 | 3.25 | 4.50 | 3.33 | 4.00 | 2.00 | 2.00 | 3.00 | 2.75 | 4.50 | 6.33 | 7.00 | 4.33 | 4.00 | 4.50 | 5.67 | 3.25 | 3.00 | 3.25 | 2.50 | 3.25 | 3.50 | 3.00 | 1.50 | 2.00 | 2.00 | 3.03 | 35.86 |
| o | 4.50 | 5.50 | 5.50 | 6.25 | 5.25 | 4.50 | 3.75 | 2.25 | 3.33 | 4.00 | 5.25 | 6.50 | 3.50 | 4.75 | 6.50 | 6.67 | 5.50 | 5.00 | 4.00 | 3.50 | 2.33 | 3.75 | 4.50 | 4.00 | 1.75 | 2.25 | 3.25 | 5.00 | 4.25 | 2.50 | 2.25 | 4.25 | 50.33 |
| i | 0.50 | 0.25 | 1.00 | 1.75 | 2.50 | 2.00 | 2.25 | 2.75 | 2.33 | 1.00 | 1.50 | 2.00 | 1.25 | 0.50 | 0.00 | 0.00 | 0.00 | 0.67 | 0.75 | 0.50 | 0.00 | 0.75 | 0.75 | 1.00 | 1.50 | 1.00 | 1.25 | 1.25 | 0.50 | 2.00 | 0.75 | 1.10 | 13.08 |
| 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 | 0.67 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.25 | 0.06 | 0.73 |
| CV | 90.75 | 104.25 | 118.75 | 144.00 | 163.00 | 178.25 | 176.00 | 159.75 | 173.67 | 118.50 | 151.75 | 153.00 | 115.25 | 122.50 | 140.00 | 129.33 | 103.50 | 137.67 | 118.75 | 109.75 | 117.33 | 159.00 | 154.75 | 117.25 | 103.75 | 113.75 | 144.25 | 174.25 | 161.50 | 166.00 | 120.00 | 136.78 | 100 |
| CVn | 43.50 | 57.25 | 62.00 | 75.75 | 67.75 | 74.00 | 83.50 | 77.75 | 94.00 | 61.00 | 73.00 | 70.50 | 24.00 | 29.25 | 48.00 | 49.33 | 42.00 | 78.00 | 72.00 | 75.00 | 85.33 | 98.50 | 70.50 | 48.75 | 35.50 | 39.75 | 63.00 | 82.25 | 74.75 | 84.00 | 47.75 | 64.12 | 46.88 |
| CVs | 47.25 | 47.00 | 56.75 | 68.25 | 95.25 | 104.25 | 92.50 | 82.00 | 79.67 | 57.50 | 78.75 | 82.50 | 91.25 | 93.25 | 92.00 | 80.00 | 61.50 | 59.67 | 46.75 | 34.75 | 32.00 | 60.50 | 84.25 | 68.50 | 68.25 | 74.00 | 81.25 | 92.00 | 86.75 | 82.00 | 72.25 | 72.66 | 53.12 |
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