Statistics of sunspot activity
June, 1987
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 | Average | % |
| W | 14.14 | 11.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 13.00 | 34.00 | 16.67 | 11.14 | 11.00 | 0.00 | 17.80 | 27.17 | 19.00 | 29.25 | 33.20 | 41.83 | 40.00 | 39.29 | 35.71 | 40.43 | 37.33 | 46.83 | 25.00 | 17.00 | 18.70 | 100 |
| Wn | 14.14 | 11.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 8.80 | 11.00 | 11.14 | 11.00 | 0.00 | 4.80 | 7.83 | 5.43 | 5.75 | 20.80 | 28.83 | 28.00 | 28.14 | 26.29 | 29.29 | 24.33 | 24.50 | 25.00 | 17.00 | 11.44 | 61.19 |
| Ws | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 13.00 | 25.20 | 5.67 | 0.00 | 0.00 | 0.00 | 13.00 | 19.33 | 13.57 | 23.50 | 12.40 | 13.00 | 12.00 | 11.14 | 9.43 | 11.14 | 13.00 | 22.33 | 0.00 | 0.00 | 7.26 | 38.81 |
| n | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 2.80 | 1.50 | 1.00 | 1.00 | 0.00 | 1.40 | 2.33 | 1.57 | 2.50 | 2.00 | 2.00 | 2.00 | 2.00 | 2.43 | 3.00 | 3.17 | 3.83 | 2.00 | 1.50 | 1.37 | 100 |
| A | 0.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.40 | 1.50 | 1.00 | 1.00 | 0.00 | 0.40 | 0.83 | 0.29 | 1.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.14 | 0.29 | 1.00 | 0.50 | 0.17 | 0.00 | 0.36 | 25.97 |
| B | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.40 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.50 | 0.29 | 0.50 | 0.20 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.17 | 1.83 | 0.17 | 0.50 | 0.26 | 19.10 |
| C | 0.57 | 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 | 0.29 | 0.00 | 0.40 | 0.17 | 0.43 | 0.43 | 0.86 | 1.57 | 0.83 | 0.67 | 1.00 | 0.00 | 0.24 | 17.57 |
| D | 0.29 | 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 | 0.60 | 1.33 | 0.86 | 0.57 | 0.00 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 9.93 |
| 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 | 0.00 | 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 |
| 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 | 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 | 0.00 | 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 | 0.17 | 0.00 | 0.00 | 0.02 | 1.62 |
| 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 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.75 |
| I | 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 | 0.83 | 0.57 | 1.00 | 0.80 | 0.50 | 0.71 | 0.86 | 1.29 | 0.71 | 0.67 | 0.67 | 0.67 | 1.00 | 0.34 | 25.04 |
| x | 0.14 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 2.80 | 1.50 | 1.00 | 1.00 | 0.00 | 1.40 | 1.33 | 0.57 | 1.50 | 0.20 | 0.00 | 0.00 | 0.14 | 0.29 | 0.29 | 1.17 | 2.33 | 0.33 | 0.50 | 0.62 | 45.07 |
| r | 0.57 | 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 | 0.14 | 0.00 | 0.20 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.33 | 0.33 | 0.00 | 0.06 | 4.67 |
| s | 0.29 | 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 | 0.67 | 0.57 | 1.00 | 1.40 | 1.33 | 1.71 | 1.71 | 1.71 | 2.14 | 1.33 | 0.67 | 1.00 | 0.50 | 0.53 | 39.10 |
| a | 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 | 0.00 | 0.00 | 0.20 | 0.50 | 0.14 | 0.14 | 0.43 | 0.43 | 0.17 | 0.33 | 0.33 | 0.50 | 0.11 | 8.15 |
| 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 | 0.17 | 0.29 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.14 | 0.33 | 0.17 | 0.00 | 0.00 | 0.04 | 3.02 |
| 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 | 0.00 | 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 |
| x | 0.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.40 | 1.50 | 1.00 | 1.00 | 0.00 | 0.40 | 1.83 | 1.00 | 2.00 | 0.80 | 0.50 | 0.71 | 1.00 | 1.43 | 1.00 | 1.67 | 1.17 | 0.83 | 1.00 | 0.71 | 51.77 |
| o | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.40 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.50 | 0.57 | 0.50 | 1.20 | 1.00 | 1.14 | 0.71 | 1.00 | 2.00 | 1.50 | 2.67 | 1.17 | 0.50 | 0.63 | 45.97 |
| i | 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 | 0.14 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 2.26 |
| 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 | 0.00 | 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 |
| CV | 9.43 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.00 | 4.20 | 1.50 | 1.00 | 1.00 | 0.00 | 2.40 | 16.33 | 18.86 | 12.00 | 26.00 | 37.17 | 36.71 | 27.86 | 21.43 | 38.43 | 36.67 | 23.50 | 15.17 | 9.50 | 11.40 | 100 |
| CVn | 9.43 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.80 | 1.00 | 1.00 | 1.00 | 0.00 | 0.40 | 0.83 | 0.57 | 0.75 | 13.00 | 24.50 | 26.43 | 19.14 | 14.57 | 31.86 | 35.33 | 20.33 | 15.17 | 9.50 | 7.55 | 66.23 |
| CVs | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.00 | 3.40 | 0.50 | 0.00 | 0.00 | 0.00 | 2.00 | 15.50 | 18.29 | 11.25 | 13.00 | 12.67 | 10.29 | 8.71 | 6.86 | 6.57 | 1.33 | 3.17 | 0.00 | 0.00 | 3.85 | 33.77 |
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