Solar cycle 10
Solar cycle 10 was the tenth solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 11.3 years, beginning in December 1855 and ending in March 1867. The maximum smoothed sunspot number observed during the solar cycle was 186.2 (February 1860), and the starting minimum was 6.0. During the transit from solar cycle 10 to 11, there were a total of 406 days with no sunspots.
| Solar cycle 10 | |
|---|---|
Sunspots during solar cycle 10, as sketched by Richard Carrington (September 1, 1859). | |
| Sunspot data | |
| Start date | December 1855 |
| End date | March 1867 |
| Duration (years) | 11.3 |
| Max count | 186.2 |
| Max count month | February 1860 |
| Min count | 6.0 |
| Spotless days | 406 |
| Cycle chronology | |
| Previous cycle | Solar cycle 9 (1843-1855) |
| Next cycle | Solar cycle 11 (1867-1878) |
The first observations of solar flares occurred during this cycle.
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