Statistics of sunspot activity
May, 1988
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 | 80.57 | 99.17 | 91.83 | 110.25 | 106.50 | 88.33 | 70.25 | 94.50 | 95.57 | 95.83 | 74.71 | 56.83 | 55.67 | 44.14 | 48.71 | 72.50 | 61.40 | 42.33 | 23.00 | 23.40 | 32.63 | 45.00 | 59.17 | 55.00 | 64.00 | 96.17 | 87.86 | 96.57 | 98.83 | 85.67 | 96.00 | 72.66 | 100 |
| Wn | 19.14 | 34.17 | 24.83 | 37.50 | 38.00 | 44.83 | 50.00 | 48.25 | 40.43 | 39.17 | 39.14 | 36.33 | 35.00 | 23.71 | 29.00 | 24.33 | 15.80 | 16.67 | 4.00 | 0.00 | 1.38 | 0.00 | 0.00 | 2.75 | 0.00 | 3.67 | 1.71 | 12.71 | 24.00 | 28.67 | 53.00 | 23.49 | 32.33 |
| Ws | 61.43 | 65.00 | 67.00 | 72.75 | 68.50 | 43.50 | 20.25 | 46.25 | 55.14 | 56.67 | 35.57 | 20.50 | 20.67 | 20.43 | 19.71 | 48.17 | 45.60 | 25.67 | 19.00 | 23.40 | 31.25 | 45.00 | 59.17 | 52.25 | 64.00 | 92.50 | 86.14 | 83.86 | 74.83 | 57.00 | 43.00 | 49.17 | 67.67 |
| n | 5.71 | 6.67 | 6.00 | 7.00 | 7.00 | 6.33 | 5.25 | 6.50 | 6.00 | 6.50 | 4.71 | 4.00 | 3.83 | 3.00 | 3.57 | 4.67 | 4.40 | 2.83 | 1.50 | 1.80 | 2.38 | 2.67 | 2.50 | 2.25 | 2.33 | 3.17 | 2.14 | 2.86 | 3.83 | 3.83 | 4.43 | 4.18 | 100 |
| A | 1.14 | 0.33 | 0.83 | 1.00 | 0.75 | 1.17 | 1.75 | 0.75 | 0.57 | 2.00 | 0.86 | 0.67 | 1.50 | 1.14 | 1.00 | 0.50 | 1.40 | 0.67 | 0.33 | 0.20 | 0.25 | 1.17 | 0.83 | 0.38 | 0.50 | 0.83 | 0.14 | 0.00 | 1.17 | 0.67 | 1.29 | 0.83 | 19.88 |
| B | 1.00 | 2.17 | 0.83 | 1.25 | 1.00 | 0.50 | 0.00 | 2.75 | 2.71 | 1.83 | 1.43 | 0.33 | 0.83 | 1.00 | 1.43 | 1.83 | 0.60 | 0.67 | 0.17 | 0.60 | 1.75 | 0.67 | 0.17 | 0.00 | 0.00 | 0.00 | 0.71 | 1.29 | 0.33 | 0.00 | 0.14 | 0.90 | 21.59 |
| C | 1.29 | 1.83 | 1.00 | 1.50 | 0.25 | 0.83 | 0.25 | 1.00 | 0.57 | 0.67 | 1.00 | 1.67 | 1.00 | 0.86 | 0.86 | 1.17 | 1.00 | 0.33 | 0.50 | 0.60 | 0.25 | 0.33 | 0.33 | 1.00 | 1.00 | 1.00 | 0.29 | 0.57 | 0.50 | 0.50 | 0.00 | 0.77 | 18.47 |
| D | 0.71 | 1.00 | 1.50 | 0.50 | 0.75 | 1.17 | 1.00 | 0.75 | 1.14 | 1.00 | 0.71 | 0.00 | 0.17 | 0.00 | 0.14 | 0.83 | 0.60 | 0.83 | 0.50 | 0.40 | 0.13 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.50 | 0.57 | 0.51 | 12.14 |
| E | 0.14 | 0.00 | 0.00 | 0.75 | 1.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.83 | 0.88 | 0.83 | 0.83 | 0.14 | 0.14 | 0.00 | 0.00 | 0.57 | 0.21 | 5.11 |
| 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 | 0.33 | 0.86 | 0.86 | 1.00 | 1.00 | 0.71 | 0.15 | 3.67 |
| G | 0.14 | 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 | 0.17 | 1.14 | 0.05 | 1.12 |
| H | 0.00 | 0.17 | 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 | 0.50 | 0.83 | 0.00 | 0.05 | 1.16 |
| I | 1.29 | 1.17 | 1.83 | 2.00 | 3.25 | 2.33 | 2.25 | 1.25 | 1.00 | 1.00 | 0.71 | 1.33 | 0.33 | 0.00 | 0.14 | 0.33 | 0.80 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.17 | 0.17 | 0.00 | 0.71 | 16.86 |
| x | 2.14 | 2.50 | 1.67 | 2.25 | 1.75 | 1.67 | 1.75 | 3.50 | 3.29 | 3.83 | 2.29 | 1.00 | 2.33 | 2.14 | 2.43 | 2.33 | 2.00 | 1.33 | 0.50 | 0.80 | 2.00 | 1.83 | 1.00 | 0.38 | 0.50 | 0.83 | 0.86 | 1.29 | 1.50 | 0.67 | 1.43 | 1.73 | 41.48 |
| r | 0.57 | 0.33 | 0.33 | 0.75 | 0.00 | 0.50 | 0.75 | 1.00 | 0.57 | 0.33 | 0.57 | 1.33 | 1.17 | 0.86 | 0.71 | 1.17 | 0.80 | 0.17 | 0.00 | 0.00 | 0.13 | 0.00 | 0.17 | 0.38 | 0.00 | 0.00 | 0.14 | 0.43 | 0.00 | 0.17 | 0.00 | 0.43 | 10.28 |
| s | 1.57 | 2.17 | 2.67 | 2.50 | 4.00 | 2.17 | 2.50 | 1.75 | 1.43 | 1.50 | 1.14 | 1.00 | 0.00 | 0.00 | 0.14 | 0.33 | 0.60 | 1.17 | 0.83 | 1.00 | 0.25 | 0.50 | 0.50 | 0.50 | 0.83 | 0.83 | 0.14 | 0.14 | 0.67 | 0.83 | 0.71 | 1.11 | 26.52 |
| a | 1.29 | 1.33 | 1.33 | 1.50 | 1.25 | 1.83 | 0.25 | 0.25 | 0.57 | 0.67 | 0.71 | 0.67 | 0.33 | 0.00 | 0.29 | 0.67 | 1.00 | 0.17 | 0.17 | 0.00 | 0.00 | 0.33 | 0.33 | 0.25 | 0.50 | 0.67 | 0.14 | 0.00 | 0.17 | 0.67 | 0.71 | 0.58 | 13.92 |
| h | 0.14 | 0.17 | 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 | 0.50 | 0.67 | 1.29 | 0.09 | 2.13 |
| k | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.14 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.75 | 0.50 | 0.83 | 0.86 | 1.00 | 1.00 | 0.83 | 0.29 | 0.24 | 5.68 |
| x | 2.43 | 1.67 | 2.67 | 3.00 | 4.00 | 3.50 | 4.00 | 2.00 | 1.57 | 3.00 | 1.57 | 2.00 | 1.83 | 1.14 | 1.14 | 0.83 | 2.20 | 1.00 | 0.33 | 0.20 | 0.25 | 1.17 | 0.83 | 0.38 | 0.50 | 1.00 | 0.14 | 0.00 | 1.83 | 1.67 | 1.29 | 1.59 | 37.90 |
| o | 3.14 | 4.33 | 2.67 | 2.75 | 2.00 | 2.17 | 1.25 | 3.75 | 4.43 | 3.17 | 2.86 | 2.00 | 1.67 | 1.86 | 2.43 | 3.50 | 2.00 | 1.50 | 1.17 | 1.60 | 2.13 | 0.83 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 1.71 | 1.00 | 1.17 | 1.57 | 2.04 | 48.82 |
| i | 0.14 | 0.67 | 0.67 | 1.00 | 1.00 | 0.67 | 0.00 | 0.75 | 0.00 | 0.33 | 0.29 | 0.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.20 | 0.33 | 0.00 | 0.00 | 0.00 | 0.67 | 0.67 | 0.50 | 0.67 | 0.67 | 0.43 | 0.29 | 0.00 | 0.17 | 1.29 | 0.39 | 9.29 |
| c | 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 | 0.33 | 0.38 | 0.17 | 0.50 | 0.57 | 0.86 | 1.00 | 0.83 | 0.29 | 0.17 | 3.99 |
| CV | 50.29 | 66.67 | 63.33 | 66.00 | 79.75 | 68.17 | 46.00 | 42.25 | 46.57 | 46.50 | 33.00 | 23.00 | 13.83 | 7.43 | 12.71 | 35.17 | 27.80 | 29.00 | 17.67 | 18.00 | 8.88 | 18.50 | 46.83 | 50.25 | 43.67 | 64.67 | 53.43 | 62.00 | 89.67 | 102.00 | 117.86 | 46.80 | 100 |
| CVn | 4.86 | 7.00 | 5.00 | 9.50 | 32.75 | 35.33 | 38.50 | 23.75 | 19.00 | 16.83 | 13.57 | 14.50 | 5.33 | 3.29 | 6.14 | 5.67 | 2.80 | 2.50 | 0.50 | 0.00 | 0.13 | 0.00 | 0.00 | 0.25 | 0.00 | 0.33 | 0.29 | 2.14 | 31.67 | 57.33 | 75.57 | 13.37 | 28.57 |
| CVs | 45.43 | 59.67 | 58.33 | 56.50 | 47.00 | 32.83 | 7.50 | 18.50 | 27.57 | 29.67 | 19.43 | 8.50 | 8.50 | 4.14 | 6.57 | 29.50 | 25.00 | 26.50 | 17.17 | 18.00 | 8.75 | 18.50 | 46.83 | 50.00 | 43.67 | 64.33 | 53.14 | 59.86 | 58.00 | 44.67 | 42.29 | 33.43 | 71.43 |
|
