Start date June 1766 Duration (years) 9 Max count month September 1769 | End date June 1775 Max count 115.8 Min count 7.2 | |
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Solar cycle 2 was the second solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 9 years, beginning in June 1766 and ending in June 1775. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 115.8 (September 1769), and the minimum was 7.2.
Sunspot observations by Alexander Wilson during this period established the Wilson effect.
References
Solar cycle 2 Wikipedia(Text) CC BY-SA