How often do maximum sunspots occur?

Answer 1

Sunspot maximum occur roughly every 11 years, although it can range between around 9 to 14 years. The last one occurred in May 2013.

Answer 2

Roughly every 11 years, although it can range between around 9 to 14 years. The next should be in May 2013.

Answer 3

Maximum sunspots occur approximately every 11 years, as part of the solar cycle. During this period, the number of sunspots is at its highest level before gradually decreasing again.