Statistics of sunspot activity
March, 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 | 119.00 | 114.33 | 138.67 | 136.00 | 134.00 | 107.00 | 68.67 | 80.25 | 87.00 | 82.00 | 88.67 | 98.67 | 104.33 | 122.00 | 104.00 | 135.33 | 122.67 | 127.00 | 152.00 | 111.67 | 96.50 | 88.00 | 33.00 | 52.33 | 48.00 | 38.67 | 37.67 | 58.67 | 58.00 | 68.50 | 67.33 | 92.90 | 100 |
| Wn | 97.00 | 86.67 | 87.00 | 73.00 | 81.00 | 42.33 | 21.33 | 14.00 | 19.50 | 28.67 | 40.67 | 52.67 | 72.00 | 89.67 | 79.00 | 106.33 | 84.00 | 75.00 | 57.33 | 33.33 | 26.00 | 32.00 | 22.00 | 37.67 | 37.00 | 38.67 | 37.67 | 36.33 | 35.00 | 40.50 | 41.67 | 52.42 | 56.43 |
| Ws | 22.00 | 27.67 | 51.67 | 63.00 | 53.00 | 64.67 | 47.33 | 66.25 | 67.50 | 53.33 | 48.00 | 46.00 | 32.33 | 32.33 | 25.00 | 29.00 | 38.67 | 52.00 | 94.67 | 78.33 | 70.50 | 56.00 | 11.00 | 14.67 | 11.00 | 0.00 | 0.00 | 22.33 | 23.00 | 28.00 | 25.67 | 40.48 | 43.57 |
| n | 5.50 | 5.67 | 7.33 | 7.50 | 7.00 | 5.33 | 3.67 | 4.75 | 5.00 | 4.67 | 4.67 | 5.00 | 4.00 | 4.33 | 3.67 | 5.00 | 5.33 | 6.00 | 9.67 | 7.67 | 7.00 | 7.00 | 3.00 | 4.00 | 4.00 | 3.33 | 3.33 | 4.67 | 4.75 | 5.50 | 5.67 | 5.29 | 100 |
| A | 0.00 | 0.33 | 0.67 | 0.50 | 1.00 | 1.67 | 0.33 | 0.00 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 1.00 | 1.00 | 3.33 | 1.33 | 0.50 | 2.00 | 0.50 | 0.00 | 1.00 | 0.67 | 1.00 | 1.00 | 0.25 | 1.00 | 0.67 | 0.69 | 12.96 |
| B | 2.00 | 1.00 | 1.33 | 1.50 | 2.00 | 0.33 | 0.33 | 1.00 | 0.00 | 0.33 | 0.67 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.00 | 2.00 | 2.33 | 2.00 | 2.00 | 2.50 | 0.00 | 1.00 | 0.00 | 0.67 | 0.33 | 0.67 | 0.50 | 0.50 | 0.67 | 0.87 | 16.46 |
| C | 0.50 | 0.67 | 2.00 | 2.50 | 1.00 | 1.33 | 1.00 | 1.00 | 2.00 | 1.00 | 1.00 | 1.67 | 0.33 | 0.67 | 0.67 | 2.00 | 1.67 | 1.00 | 1.33 | 1.33 | 3.00 | 1.50 | 0.00 | 0.67 | 0.00 | 0.33 | 0.00 | 0.67 | 1.25 | 1.00 | 1.67 | 1.12 | 21.19 |
| D | 2.00 | 2.33 | 2.00 | 0.50 | 0.00 | 0.33 | 1.33 | 1.50 | 2.00 | 2.33 | 1.67 | 1.67 | 1.33 | 1.33 | 0.00 | 0.00 | 0.67 | 1.00 | 1.00 | 1.33 | 1.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.86 | 16.26 |
| E | 0.00 | 0.33 | 0.00 | 0.50 | 0.67 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.33 | 0.33 | 0.67 | 0.67 | 0.67 | 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 | 0.18 | 3.35 |
| 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 | 1.00 | 1.00 | 1.00 | 1.00 | 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 | 0.13 | 2.44 |
| G | 1.00 | 1.00 | 1.33 | 2.00 | 1.67 | 1.33 | 0.67 | 0.50 | 0.00 | 0.67 | 1.00 | 0.00 | 1.00 | 0.33 | 0.33 | 0.33 | 0.33 | 1.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 0.00 | 0.53 | 10.01 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 | 0.91 |
| I | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.25 | 0.50 | 0.00 | 0.33 | 0.33 | 0.67 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.67 | 1.67 | 0.50 | 1.00 | 2.50 | 2.00 | 2.00 | 1.67 | 2.00 | 2.33 | 2.50 | 2.00 | 2.67 | 0.87 | 16.41 |
| x | 2.00 | 1.33 | 2.00 | 2.00 | 3.00 | 2.00 | 0.67 | 1.00 | 0.50 | 0.67 | 0.67 | 0.00 | 0.00 | 0.33 | 0.67 | 1.00 | 1.00 | 3.00 | 5.67 | 3.33 | 2.50 | 4.50 | 0.50 | 1.00 | 1.00 | 1.33 | 1.33 | 1.67 | 0.75 | 1.50 | 1.33 | 1.56 | 29.42 |
| r | 0.50 | 0.33 | 0.33 | 1.50 | 1.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.33 | 0.00 | 0.33 | 0.67 | 0.00 | 0.33 | 0.33 | 1.50 | 0.50 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.31 | 5.89 |
| s | 1.00 | 1.00 | 2.33 | 1.00 | 1.33 | 1.67 | 2.00 | 2.25 | 1.50 | 1.67 | 1.33 | 2.00 | 1.67 | 2.00 | 1.33 | 2.33 | 2.00 | 2.00 | 1.33 | 3.00 | 2.50 | 2.00 | 2.50 | 2.33 | 2.00 | 2.00 | 1.33 | 3.00 | 3.25 | 2.50 | 3.33 | 1.98 | 37.50 |
| a | 2.00 | 3.00 | 2.67 | 2.50 | 1.33 | 0.67 | 1.00 | 1.00 | 3.00 | 2.33 | 2.67 | 2.33 | 1.33 | 0.67 | 0.67 | 0.67 | 1.33 | 1.00 | 1.67 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.67 | 0.00 | 0.75 | 1.50 | 0.67 | 1.22 | 23.12 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.67 | 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 | 0.06 | 1.12 |
| k | 0.00 | 0.00 | 0.00 | 0.50 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.33 | 1.00 | 0.67 | 0.33 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.16 | 2.95 |
| x | 0.00 | 0.33 | 0.67 | 0.50 | 1.67 | 1.67 | 0.33 | 0.75 | 1.00 | 0.33 | 0.33 | 0.67 | 1.00 | 0.67 | 0.67 | 0.00 | 1.00 | 1.00 | 4.33 | 3.00 | 1.00 | 3.00 | 3.00 | 2.00 | 3.00 | 2.33 | 3.00 | 3.33 | 2.75 | 3.00 | 3.33 | 1.60 | 30.28 |
| o | 5.00 | 4.67 | 6.00 | 6.50 | 4.67 | 3.33 | 3.33 | 4.00 | 3.50 | 4.33 | 4.33 | 3.33 | 2.67 | 2.00 | 1.33 | 3.33 | 2.67 | 5.00 | 5.33 | 4.67 | 6.00 | 4.00 | 0.00 | 2.00 | 1.00 | 1.00 | 0.33 | 1.33 | 2.00 | 2.50 | 2.33 | 3.31 | 62.50 |
| i | 0.50 | 0.33 | 0.33 | 0.50 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.33 | 1.00 | 1.00 | 1.33 | 1.33 | 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 | 0.27 | 5.08 |
| c | 0.00 | 0.33 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.67 | 0.33 | 0.33 | 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 | 0.11 | 2.13 |
| CV | 72.00 | 87.67 | 98.00 | 96.50 | 80.33 | 68.00 | 56.67 | 80.00 | 71.50 | 73.67 | 68.33 | 91.67 | 97.67 | 114.67 | 90.67 | 92.00 | 91.00 | 62.00 | 80.33 | 62.00 | 55.50 | 30.50 | 25.50 | 31.67 | 43.00 | 22.33 | 19.67 | 33.00 | 43.75 | 52.50 | 43.00 | 65.65 | 100 |
| CVn | 49.00 | 61.33 | 60.67 | 63.50 | 53.00 | 33.67 | 22.00 | 15.00 | 8.00 | 20.00 | 21.33 | 32.00 | 52.67 | 82.00 | 80.00 | 74.00 | 63.00 | 34.00 | 52.33 | 25.33 | 14.50 | 13.50 | 20.00 | 26.00 | 42.00 | 22.33 | 19.67 | 30.67 | 30.00 | 30.00 | 27.00 | 38.02 | 57.91 |
| CVs | 23.00 | 26.33 | 37.33 | 33.00 | 27.33 | 34.33 | 34.67 | 65.00 | 63.50 | 53.67 | 47.00 | 59.67 | 45.00 | 32.67 | 10.67 | 18.00 | 28.00 | 28.00 | 28.00 | 36.67 | 41.00 | 17.00 | 5.50 | 5.67 | 1.00 | 0.00 | 0.00 | 2.33 | 13.75 | 22.50 | 16.00 | 27.63 | 42.09 |
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