Spörer's law

[1] It was discovered by the English astronomer Richard Christopher Carrington around 1861.

[2] Carrington's work was refined by the German astronomer Gustav Spörer.

At the start of a solar cycle, active regions tend to appear around 30° to 45° latitude on the Sun's surface.

The average latitude then continues to drift lower, down to about 7° and then while the old sunspot cycle fades, active regions of the new cycle start appearing at high latitudes.

This article related to the Sun is a stub.