Hale cycle

As Hale- cycle is defined as the magnetic cycle of the Sun of 22.1 years, which manifests itself in the form of sunspots. He is the real cycle of solar activity. It is composed of two 11-year cycles.

Sunspots are disturbances of the solar magnetic field. The sunspots in the northern hemisphere have here the opposite polarity of the sunspots in the southern hemisphere. The polarity changes every 11 years, so the 22-year cycle is created.

The cycle is named in honor of George Ellery Hale, who discovered in 1908 that sunspots always have strong magnetic fields.