Statistics of sunspot activity
February, 1998
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 | 23.33 | 17.00 | 33.33 | 26.33 | 34.33 | 40.00 | 27.33 | 33.50 | 38.33 | 60.00 | 53.67 | 59.33 | 61.50 | 95.33 | 79.00 | 83.50 | 68.50 | 60.50 | 45.25 | 29.50 | 28.00 | 29.33 | 50.75 | 72.25 | 70.75 | 57.25 | 65.67 | 60.25 | 50.14 | 100 |
| Wn | 11.67 | 0.00 | 14.00 | 14.33 | 12.33 | 11.50 | 0.00 | 0.00 | 0.00 | 7.33 | 8.00 | 7.33 | 11.00 | 32.00 | 17.33 | 35.25 | 22.50 | 22.50 | 11.50 | 2.75 | 0.00 | 0.00 | 19.25 | 47.00 | 42.25 | 33.50 | 26.33 | 15.25 | 15.18 | 30.27 |
| Ws | 11.67 | 17.00 | 19.33 | 12.00 | 22.00 | 28.50 | 27.33 | 33.50 | 38.33 | 52.67 | 45.67 | 52.00 | 50.50 | 63.33 | 61.67 | 48.25 | 46.00 | 38.00 | 33.75 | 26.75 | 28.00 | 29.33 | 31.50 | 25.25 | 28.50 | 23.75 | 39.33 | 45.00 | 34.96 | 69.73 |
| n | 2.00 | 1.50 | 2.67 | 2.00 | 2.67 | 3.00 | 2.00 | 2.75 | 3.33 | 5.00 | 4.33 | 4.33 | 4.00 | 5.67 | 4.33 | 4.75 | 3.75 | 3.75 | 3.00 | 2.00 | 2.00 | 2.33 | 3.50 | 4.50 | 4.25 | 3.00 | 4.00 | 4.00 | 3.37 | 100 |
| A | 0.67 | 0.00 | 0.67 | 0.00 | 0.33 | 0.50 | 0.00 | 0.00 | 1.33 | 1.67 | 1.67 | 2.33 | 1.50 | 2.33 | 0.67 | 0.50 | 0.75 | 0.25 | 0.50 | 0.50 | 0.00 | 0.00 | 0.25 | 0.75 | 1.75 | 1.00 | 0.33 | 0.00 | 0.72 | 21.45 |
| B | 0.00 | 0.50 | 0.67 | 0.00 | 0.67 | 1.00 | 0.67 | 1.50 | 0.67 | 1.67 | 1.00 | 0.67 | 1.00 | 0.67 | 2.00 | 2.00 | 1.00 | 2.00 | 1.25 | 0.50 | 1.00 | 1.33 | 1.50 | 2.50 | 0.00 | 0.00 | 2.00 | 1.75 | 1.05 | 31.24 |
| C | 0.33 | 0.00 | 0.33 | 1.33 | 1.00 | 0.00 | 0.33 | 0.25 | 0.67 | 0.67 | 0.33 | 0.00 | 0.00 | 1.33 | 0.33 | 1.25 | 0.75 | 0.50 | 0.25 | 0.25 | 0.33 | 0.00 | 0.75 | 0.25 | 0.50 | 0.00 | 0.33 | 1.25 | 0.48 | 14.12 |
| D | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.50 | 0.00 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 1.00 | 1.00 | 1.50 | 2.00 | 1.33 | 1.00 | 0.38 | 11.21 |
| E | 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 | 0.67 | 0.33 | 1.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.18 | 5.30 |
| 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 | 0.00 | 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 |
| G | 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 | 0.00 | 0.00 | 0.00 | 0.50 | 0.75 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 2.38 |
| 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 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.35 |
| I | 1.00 | 1.00 | 1.00 | 0.67 | 0.67 | 1.50 | 1.00 | 1.00 | 0.67 | 1.00 | 1.00 | 0.33 | 0.50 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.47 | 13.95 |
| x | 0.67 | 0.50 | 1.33 | 0.00 | 1.00 | 1.50 | 0.67 | 1.50 | 2.00 | 3.33 | 2.67 | 3.00 | 2.50 | 3.00 | 2.67 | 2.50 | 1.75 | 2.25 | 1.75 | 1.00 | 1.00 | 1.33 | 1.75 | 3.25 | 1.75 | 1.00 | 2.33 | 1.75 | 1.78 | 52.69 |
| r | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 0.33 | 0.00 | 0.33 | 0.00 | 0.33 | 0.33 | 0.00 | 0.67 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.33 | 1.50 | 0.27 | 7.94 |
| s | 1.00 | 1.00 | 1.33 | 1.67 | 1.00 | 1.00 | 1.00 | 1.25 | 1.00 | 1.67 | 0.67 | 1.00 | 1.00 | 1.33 | 1.33 | 0.25 | 0.00 | 0.50 | 0.25 | 0.00 | 0.00 | 0.67 | 1.25 | 0.50 | 1.00 | 0.25 | 0.00 | 0.25 | 0.79 | 23.48 |
| a | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 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 | 0.25 | 0.50 | 1.25 | 1.50 | 1.33 | 0.50 | 0.24 | 7.06 |
| 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 | 0.33 | 0.00 | 0.00 | 0.50 | 1.00 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 2.82 |
| k | 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 | 0.67 | 0.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.50 | 0.67 | 0.33 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.20 | 6.00 |
| x | 1.67 | 1.00 | 1.67 | 0.67 | 1.00 | 2.00 | 1.00 | 1.00 | 2.00 | 2.67 | 2.67 | 2.67 | 2.00 | 2.67 | 1.00 | 0.50 | 0.75 | 0.25 | 0.50 | 0.50 | 0.00 | 1.00 | 0.25 | 0.75 | 2.25 | 1.00 | 0.33 | 0.00 | 1.21 | 35.75 |
| o | 0.33 | 0.50 | 1.00 | 1.33 | 1.67 | 1.00 | 1.00 | 1.75 | 1.33 | 2.33 | 1.67 | 1.33 | 1.50 | 2.33 | 2.67 | 3.25 | 2.00 | 2.50 | 2.00 | 1.50 | 2.00 | 1.33 | 3.25 | 3.25 | 1.75 | 1.50 | 3.67 | 4.00 | 1.92 | 56.93 |
| i | 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 | 0.33 | 0.33 | 1.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.25 | 0.50 | 0.00 | 0.00 | 0.22 | 6.62 |
| 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 | 0.33 | 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 | 0.02 | 0.71 |
| CV | 12.33 | 11.00 | 15.67 | 20.33 | 16.33 | 14.50 | 13.00 | 15.75 | 14.67 | 22.33 | 20.67 | 31.00 | 44.50 | 60.67 | 49.33 | 59.25 | 56.75 | 59.75 | 57.25 | 46.25 | 45.67 | 21.67 | 33.50 | 29.00 | 49.00 | 48.00 | 31.33 | 26.50 | 33.07 | 100 |
| CVn | 2.33 | 0.00 | 1.67 | 11.00 | 5.67 | 2.50 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 0.67 | 1.00 | 4.67 | 2.67 | 8.00 | 7.25 | 5.50 | 1.50 | 0.25 | 0.00 | 0.00 | 2.75 | 23.25 | 26.50 | 27.00 | 19.33 | 8.50 | 5.85 | 17.67 |
| CVs | 10.00 | 11.00 | 14.00 | 9.33 | 10.67 | 12.00 | 13.00 | 15.75 | 14.67 | 21.67 | 19.67 | 30.33 | 43.50 | 56.00 | 46.67 | 51.25 | 49.50 | 54.25 | 55.75 | 46.00 | 45.67 | 21.67 | 30.75 | 5.75 | 22.50 | 21.00 | 12.00 | 18.00 | 27.23 | 82.33 |
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