What Is Solar Cycle?
The Sun's roughly 11-year rhythm of more and fewer sunspots, flares, and storms. In technical terms: The quasi-periodic, approximately 11-year variation in solar magnetic activity marked by sunspot number, flare and CME frequency, and EUV output, within a 22-year magnetic polarity (Hale) cycle; Solar Cycle 25 began in December 2019.
Also called: Sunspot Cycle, 11-Year Cycle
Solar Cycle In Plain English
The Sun's roughly 11-year rhythm of more and fewer sunspots, flares, and storms.
The Technical Definition
The quasi-periodic, approximately 11-year variation in solar magnetic activity marked by sunspot number, flare and CME frequency, and EUV output, within a 22-year magnetic polarity (Hale) cycle; Solar Cycle 25 began in December 2019.
Lessons That Use Solar Cycle
- The Sun, Solar Flares And CMEs Unit 15: Space Weather
