Statistics of sunspot activity
March, 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 | 55.50 | 61.67 | 129.50 | 134.50 | 127.67 | 122.75 | 100.33 | 81.00 | 97.67 | 133.75 | 124.00 | 137.50 | 109.67 | 139.00 | 112.67 | 84.67 | 69.75 | 72.00 | 71.75 | 89.67 | 99.00 | 108.33 | 131.00 | 181.00 | 277.67 | 286.33 | 325.75 | 331.50 | 288.33 | 313.67 | 287.75 | 151.14 | 100 |
| Wn | 24.00 | 28.33 | 81.25 | 74.75 | 79.00 | 91.25 | 72.67 | 68.25 | 61.00 | 69.25 | 44.50 | 43.75 | 24.67 | 18.00 | 18.33 | 16.67 | 21.00 | 23.25 | 35.75 | 45.67 | 58.00 | 81.33 | 88.75 | 116.00 | 170.00 | 153.33 | 178.25 | 166.50 | 150.33 | 161.33 | 153.50 | 78.02 | 51.62 |
| Ws | 31.50 | 33.33 | 48.25 | 59.75 | 48.67 | 31.50 | 27.67 | 12.75 | 36.67 | 64.50 | 79.50 | 93.75 | 85.00 | 121.00 | 94.33 | 68.00 | 48.75 | 48.75 | 36.00 | 44.00 | 41.00 | 27.00 | 42.25 | 65.00 | 107.67 | 133.00 | 147.50 | 165.00 | 138.00 | 152.33 | 134.25 | 73.12 | 48.38 |
| n | 4.00 | 4.67 | 7.50 | 7.50 | 7.33 | 6.50 | 5.67 | 3.75 | 5.00 | 6.25 | 7.00 | 8.25 | 6.00 | 7.00 | 4.00 | 4.00 | 3.25 | 3.25 | 4.00 | 5.33 | 6.50 | 5.67 | 8.00 | 10.75 | 14.33 | 14.33 | 16.00 | 17.25 | 15.67 | 13.33 | 12.25 | 7.88 | 100 |
| A | 0.50 | 0.00 | 0.00 | 0.50 | 0.00 | 0.50 | 0.67 | 0.00 | 1.00 | 0.25 | 2.00 | 1.75 | 0.67 | 1.33 | 0.33 | 0.67 | 0.25 | 1.00 | 0.00 | 0.00 | 0.50 | 0.00 | 1.25 | 1.00 | 2.67 | 0.67 | 1.25 | 2.50 | 1.67 | 1.00 | 0.75 | 0.80 | 10.10 |
| B | 0.50 | 0.00 | 1.50 | 0.50 | 0.33 | 0.00 | 0.67 | 0.50 | 0.00 | 0.50 | 0.25 | 0.50 | 0.67 | 1.00 | 0.33 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.75 | 1.33 | 0.67 | 1.50 | 1.75 | 1.00 | 1.67 | 0.25 | 0.55 | 7.03 |
| C | 1.00 | 1.33 | 1.25 | 1.25 | 0.67 | 1.25 | 0.67 | 0.00 | 1.33 | 0.50 | 0.75 | 1.00 | 1.33 | 2.00 | 0.67 | 1.67 | 0.75 | 0.25 | 1.00 | 1.33 | 0.50 | 1.33 | 0.25 | 2.25 | 4.33 | 2.33 | 2.75 | 3.75 | 1.67 | 2.67 | 2.00 | 1.41 | 17.94 |
| D | 1.00 | 1.33 | 4.00 | 2.75 | 3.00 | 2.00 | 1.67 | 0.75 | 0.67 | 3.00 | 2.25 | 0.50 | 0.67 | 0.67 | 1.33 | 0.67 | 0.75 | 0.25 | 0.25 | 1.33 | 1.50 | 1.67 | 2.25 | 2.00 | 2.67 | 3.67 | 4.50 | 2.25 | 2.67 | 0.67 | 2.25 | 1.77 | 22.48 |
| E | 0.00 | 0.00 | 0.00 | 0.50 | 0.33 | 0.75 | 0.67 | 0.75 | 1.00 | 0.50 | 0.25 | 1.25 | 1.00 | 0.67 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 0.75 | 1.00 | 1.33 | 0.00 | 0.25 | 1.00 | 1.33 | 1.50 | 0.53 | 6.68 |
| 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 | 0.33 | 0.33 | 0.67 | 0.50 | 0.25 | 0.75 | 0.00 | 0.00 | 0.67 | 0.50 | 1.25 | 1.33 | 1.67 | 1.25 | 1.25 | 1.00 | 1.00 | 1.50 | 0.46 | 5.83 |
| G | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 0.75 | 1.00 | 0.75 | 0.33 | 1.00 | 0.75 | 1.00 | 0.33 | 0.00 | 0.33 | 0.00 | 0.75 | 1.00 | 1.25 | 1.67 | 3.00 | 1.00 | 1.50 | 0.75 | 0.67 | 0.67 | 2.50 | 1.25 | 1.67 | 1.67 | 0.50 | 0.89 | 11.29 |
| H | 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 | 0.00 | 0.00 | 0.25 | 0.00 | 0.33 | 0.50 | 0.04 | 0.55 |
| I | 1.00 | 2.00 | 0.75 | 1.50 | 2.00 | 1.25 | 0.33 | 0.75 | 0.67 | 0.50 | 0.75 | 2.25 | 1.33 | 1.00 | 0.33 | 0.00 | 0.25 | 0.00 | 0.75 | 1.00 | 1.00 | 0.67 | 1.25 | 2.00 | 0.33 | 3.33 | 2.25 | 4.00 | 5.00 | 3.00 | 3.00 | 1.43 | 18.11 |
| x | 1.00 | 0.00 | 1.50 | 1.00 | 0.33 | 0.50 | 1.33 | 0.50 | 1.00 | 0.75 | 2.25 | 2.25 | 1.33 | 2.33 | 0.67 | 0.67 | 0.25 | 1.50 | 0.00 | 0.00 | 0.50 | 0.00 | 1.75 | 1.75 | 4.00 | 1.33 | 2.75 | 4.25 | 2.67 | 2.67 | 1.00 | 1.35 | 17.12 |
| r | 0.00 | 2.67 | 1.00 | 0.75 | 0.33 | 0.75 | 0.33 | 0.00 | 0.00 | 0.75 | 0.50 | 0.25 | 0.33 | 0.33 | 0.00 | 0.33 | 0.50 | 0.50 | 0.75 | 0.33 | 0.00 | 0.33 | 0.25 | 1.50 | 0.67 | 2.33 | 1.50 | 1.00 | 1.33 | 0.00 | 0.25 | 0.63 | 8.02 |
| s | 3.00 | 2.00 | 2.25 | 2.25 | 3.33 | 1.00 | 0.33 | 0.75 | 1.67 | 0.75 | 0.50 | 3.25 | 2.33 | 2.33 | 2.33 | 0.67 | 0.50 | 0.25 | 0.75 | 2.00 | 1.50 | 1.67 | 2.75 | 3.75 | 3.33 | 5.67 | 7.25 | 7.25 | 5.33 | 3.67 | 3.50 | 2.51 | 31.89 |
| a | 0.00 | 0.00 | 2.75 | 3.50 | 3.33 | 4.00 | 3.67 | 1.50 | 1.67 | 3.25 | 3.25 | 2.50 | 2.00 | 2.00 | 1.00 | 2.33 | 2.00 | 1.00 | 2.25 | 3.00 | 4.50 | 3.00 | 2.25 | 2.75 | 5.00 | 3.67 | 3.50 | 3.50 | 5.33 | 4.33 | 5.00 | 2.83 | 35.95 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.50 | 0.07 | 0.92 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.33 | 1.00 | 1.00 | 1.33 | 1.33 | 1.00 | 1.25 | 1.00 | 2.00 | 2.00 | 0.48 | 6.11 |
| x | 1.50 | 2.00 | 0.75 | 2.00 | 2.00 | 1.75 | 1.00 | 1.00 | 1.67 | 0.75 | 2.75 | 4.00 | 2.00 | 2.33 | 0.67 | 0.67 | 0.50 | 1.00 | 0.75 | 1.00 | 1.50 | 0.67 | 2.50 | 3.00 | 3.00 | 4.00 | 3.50 | 6.75 | 6.67 | 4.33 | 4.25 | 2.27 | 28.75 |
| o | 2.50 | 2.67 | 5.00 | 3.75 | 5.00 | 3.75 | 4.00 | 1.75 | 2.33 | 4.50 | 3.25 | 3.00 | 3.00 | 3.67 | 2.33 | 2.00 | 2.25 | 2.00 | 2.50 | 4.33 | 5.00 | 4.00 | 4.25 | 5.50 | 8.00 | 6.33 | 11.00 | 8.75 | 6.00 | 6.67 | 5.00 | 4.33 | 54.88 |
| i | 0.00 | 0.00 | 1.75 | 1.75 | 0.33 | 1.00 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.67 | 0.67 | 0.67 | 1.33 | 0.50 | 0.25 | 0.50 | 0.00 | 0.00 | 1.00 | 1.00 | 1.50 | 2.67 | 3.33 | 0.75 | 1.00 | 2.67 | 1.33 | 2.00 | 1.04 | 13.23 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.75 | 0.67 | 0.67 | 0.75 | 0.75 | 0.33 | 1.00 | 1.00 | 0.25 | 3.14 |
| CV | 47.50 | 48.00 | 104.00 | 107.00 | 117.67 | 100.00 | 76.67 | 83.00 | 79.67 | 119.00 | 94.50 | 97.75 | 75.33 | 74.33 | 71.67 | 51.67 | 49.50 | 34.75 | 71.00 | 85.00 | 105.00 | 117.33 | 149.50 | 176.75 | 213.67 | 255.67 | 260.75 | 231.75 | 230.33 | 241.00 | 252.00 | 123.28 | 100 |
| CVn | 30.00 | 16.33 | 68.00 | 52.25 | 65.33 | 75.25 | 62.33 | 77.00 | 58.33 | 62.50 | 45.50 | 35.00 | 24.67 | 15.33 | 19.33 | 15.67 | 16.50 | 11.00 | 32.25 | 56.67 | 59.00 | 90.00 | 114.75 | 130.25 | 133.67 | 145.33 | 125.75 | 119.50 | 127.00 | 129.67 | 134.00 | 69.30 | 56.21 |
| CVs | 17.50 | 31.67 | 36.00 | 54.75 | 52.33 | 24.75 | 14.33 | 6.00 | 21.33 | 56.50 | 49.00 | 62.75 | 50.67 | 59.00 | 52.33 | 36.00 | 33.00 | 23.75 | 38.75 | 28.33 | 46.00 | 27.33 | 34.75 | 46.50 | 80.00 | 110.33 | 135.00 | 112.25 | 103.33 | 111.33 | 118.00 | 53.99 | 43.79 |
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