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Table 2
Dates for the sunspot minima obtained from the GF-smoothed WSN-S and GSN-S series and from the fraction of spotless days (SD), along with the dates given by Waldmeier (1961).
| Method | Cycles 7/8 | Cycles 8/9 | Cycles 9/10 | Cycles 10/11* |
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| WSN-S min date | 1833/12 | 1843/7 | 1855/12 | 1867/5 |
| GSN-S min date | 1834/2 | 1843/7 | 1855/12 | 1867/5 |
| SD max date | 1833/11 | 1843/7 | 1855/12 | 1867/5 |
| Waldmeier | 1833/11 | 1843/7 | 1855/12 | 1867/3 |
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