Solar cycle 7

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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]

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