Solar cycle 7
| Solar cycle 7 | |
|---|---|
| Sunspot Data | |
| Start date | May 1823 |
| End date | November 1833 |
| Duration (years) | 10.5 |
| Max count | 71.5 |
| Max count month | November 1829 |
| Min count | 7.3 |
| Cycle chronology | |
| Previous cycle | Solar cycle 6 (1810-1823) |
| Next cycle | Solar cycle 8 (1833-1843) |
Heinrich Schwabe, who discovered the sunspot cycle, began his personal observations in 1826, during solar cycle 7.[1]
Solar cycle 7 was the seventh solar cycle since 1755, when extensive recording of solar sunspot activity began.[2][3] The solar cycle lasted 10.5 years, beginning in May 1823 and ending in November 1833 (thus overlapping the Dalton Minimum). The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 71.5 (November 1829), and the minimum was 7.3.[4]
See also
References
- ↑ Excerpts from Solar Observations During 1843 by Heinrich Schwabe, (Astronomische Nachrichten, vol. 20., no. 495, 1843)
- ↑ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
- ↑ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.
- ↑ SIDC Monthly Smoothed Sunspot Number. ""
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