Statistics of sunspot activity
May, 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 | 29 | 30 | 31 | Average | % |
| W | 79.67 | 98.50 | 111.75 | 101.50 | 99.67 | 105.00 | 80.67 | 80.00 | 56.00 | 39.75 | 68.75 | 88.25 | 91.00 | 95.00 | 93.50 | 90.67 | 88.00 | 82.67 | 74.50 | 47.50 | 28.50 | 20.50 | 39.25 | 42.00 | | | | | | | | 75.11 | 100 |
| Wn | 32.33 | 37.75 | 58.25 | 64.00 | 64.67 | 59.50 | 40.00 | 43.67 | 16.00 | 3.75 | 6.00 | 16.25 | 20.25 | 29.67 | 31.25 | 30.33 | 28.67 | 33.67 | 27.00 | 18.75 | 16.50 | 15.00 | 28.25 | 31.00 | | | | | | | | 31.35 | 41.75 |
| Ws | 47.33 | 60.75 | 53.50 | 37.50 | 35.00 | 45.50 | 40.67 | 36.33 | 40.00 | 36.00 | 62.75 | 72.00 | 70.75 | 65.33 | 62.25 | 60.33 | 59.33 | 49.00 | 47.50 | 28.75 | 12.00 | 5.50 | 11.00 | 11.00 | | | | | | | | 43.75 | 58.25 |
| n | 2.67 | 3.75 | 3.25 | 3.50 | 3.67 | 5.00 | 4.00 | 4.00 | 3.00 | 2.25 | 4.50 | 4.75 | 4.00 | 3.67 | 3.00 | 3.00 | 3.00 | 3.00 | 4.00 | 3.00 | 2.00 | 1.50 | 2.75 | 2.00 | | | | | | | | 3.30 | 100 |
| A | 0.67 | 1.25 | 0.25 | 0.50 | 0.67 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.75 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.75 | 0.75 | 1.00 | 0.50 | 1.50 | 1.00 | | | | | | | | 0.55 | 16.72 |
| B | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.75 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 2.25 | 1.25 | 0.00 | 0.25 | 0.50 | 0.00 | | | | | | | | 0.29 | 8.73 |
| C | 1.00 | 0.25 | 0.50 | 0.75 | 0.00 | 1.00 | 1.00 | 0.00 | 1.00 | 0.25 | 0.25 | 0.50 | 0.50 | 0.33 | 0.00 | 0.33 | 0.67 | 0.00 | 0.50 | 0.75 | 0.00 | 0.50 | 0.75 | 0.00 | | | | | | | | 0.45 | 13.67 |
| D | 1.00 | 0.75 | 0.75 | 0.50 | 1.00 | 0.00 | 1.00 | 1.00 | 0.50 | 0.00 | 0.50 | 1.50 | 0.25 | 0.00 | 0.25 | 0.33 | 0.00 | 0.33 | 0.25 | 0.25 | 1.00 | 0.25 | 0.00 | 1.00 | | | | | | | | 0.52 | 15.67 |
| E | 0.00 | 0.75 | 0.75 | 0.75 | 0.33 | 0.00 | 0.00 | 0.00 | 0.50 | 0.25 | 0.25 | 0.50 | 1.25 | 1.67 | 1.50 | 1.67 | 1.33 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.51 | 15.35 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.67 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.20 | 6.10 |
| G | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.75 | 0.25 | 1.00 | 1.00 | 1.00 | 0.67 | 1.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.29 | 8.83 |
| H | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.01 | 0.42 |
| I | 0.00 | 0.50 | 1.00 | 1.00 | 1.00 | 1.00 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.48 | 14.51 |
| x | 0.67 | 1.25 | 0.25 | 0.50 | 0.67 | 2.00 | 0.00 | 1.00 | 0.00 | 0.00 | 1.75 | 1.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 1.00 | 3.00 | 2.00 | 1.00 | 0.75 | 2.00 | 1.00 | | | | | | | | 0.84 | 25.45 |
| r | 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 | 0.67 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | | | | | | | | 0.09 | 2.63 |
| s | 0.33 | 1.00 | 1.75 | 1.00 | 1.00 | 1.00 | 1.67 | 1.00 | 1.00 | 2.00 | 2.50 | 2.00 | 2.50 | 2.00 | 1.50 | 0.67 | 1.00 | 1.00 | 0.50 | 0.00 | 0.50 | 0.00 | 0.25 | 0.00 | | | | | | | | 1.09 | 33.02 |
| a | 0.67 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 1.00 | 0.67 | 1.00 | 0.25 | 0.25 | 1.50 | 1.50 | 1.33 | 1.25 | 1.67 | 1.33 | 1.00 | 0.50 | 1.00 | 0.50 | 0.75 | 0.00 | 1.00 | | | | | | | | 0.75 | 22.61 |
| h | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 0.50 | 0.33 | 0.33 | 0.50 | 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 | | | | | | | | 0.12 | 3.58 |
| k | 1.00 | 1.00 | 1.00 | 1.50 | 1.33 | 1.50 | 1.00 | 1.00 | 0.50 | 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 | | | | | | | | 0.42 | 12.72 |
| x | 0.67 | 1.75 | 1.25 | 1.50 | 1.67 | 3.00 | 1.00 | 1.00 | 1.00 | 1.00 | 2.00 | 1.75 | 1.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.33 | 0.75 | 0.75 | 1.00 | 0.50 | 1.50 | 1.00 | | | | | | | | 1.05 | 31.65 |
| o | 0.67 | 0.50 | 0.25 | 1.00 | 0.67 | 1.00 | 1.67 | 1.33 | 1.50 | 1.00 | 2.25 | 2.25 | 1.75 | 1.33 | 1.25 | 1.33 | 1.67 | 1.33 | 2.50 | 1.75 | 1.00 | 1.00 | 1.25 | 0.00 | | | | | | | | 1.26 | 38.17 |
| i | 1.33 | 1.00 | 1.25 | 0.50 | 0.67 | 0.50 | 0.67 | 1.67 | 0.50 | 0.25 | 0.25 | 0.50 | 1.00 | 1.00 | 1.25 | 1.00 | 0.33 | 0.67 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | | | | | | | | 0.68 | 20.61 |
| c | 0.00 | 0.50 | 0.50 | 0.50 | 0.67 | 0.50 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.67 | 0.50 | 0.67 | 1.00 | 0.67 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | | | | | | | 0.32 | 9.57 |
| CV | 58.33 | 77.75 | 83.00 | 95.00 | 112.33 | 104.00 | 106.00 | 91.00 | 70.50 | 38.00 | 53.00 | 76.00 | 78.00 | 78.67 | 84.00 | 66.67 | 68.00 | 57.00 | 24.75 | 15.00 | 23.00 | 9.75 | 7.75 | 23.00 | | | | | | | | 62.52 | 100 |
| CVn | 14.33 | 23.50 | 31.75 | 46.25 | 56.00 | 54.50 | 55.00 | 52.00 | 39.50 | 2.75 | 0.75 | 10.00 | 18.50 | 18.00 | 27.50 | 20.67 | 23.00 | 26.67 | 19.25 | 11.75 | 22.00 | 9.25 | 6.75 | 22.00 | | | | | | | | 25.49 | 40.76 |
| CVs | 44.00 | 54.25 | 51.25 | 48.75 | 56.33 | 49.50 | 51.00 | 39.00 | 31.00 | 35.25 | 52.25 | 66.00 | 59.50 | 60.67 | 56.50 | 46.00 | 45.00 | 30.33 | 5.50 | 3.25 | 1.00 | 0.50 | 1.00 | 1.00 | | | | | | | | 37.03 | 59.24 |
|
