Solar cycle 13

Solar cycle 13
The solar corona during an eclipse in solar cycle 13 (1893).
Sunspot data
Start date	March 1890
End date	January 1902
Duration (years)	11.8
Max count	146.5
Max count month	January 1894
Min count	8.3
Spotless days	934
Cycle chronology
Previous cycle	Solar cycle 12 (1878-1890)
Next cycle	Solar cycle 14 (1902-1913)

Solar cycle 13 was the thirteenth solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 11.8 years, beginning in March 1890 and ending in January 1902. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 146.5 (January 1894), and the starting minimum was 8.3. During the minimum transit from solar cycle 13 to 14, there were a total of 934 days with no sunspots.

There were a number of intense solar proton events during solar cycle 13, as well as geomagnetic storms such as e.g. in September 1898 which affected telegraph lines.