Yes, 11 year cycles and we are heading into lowest one in our lifetime. Expect extreme variations in weather. Hoter hots, colder colds, windier winds. Lousy radiowave propagation.
Thanks for the info.
When I took astronomy in college around 1960, we were told about the 11 year sun spot cycle, and also an 88 year mega-cycle. Subtracting 88 from 2018 give us around 1930, a period of intense drought, dust storms and the Great Depression. The 11 and 88 figures are not absolute, but an approximation. Peaks and troughs also last for several years. Could be 10, 14, 86, 90, etc. See charts in link below. The charts can be clicked to magnify them.
https://en.wikipedia.org/wiki/Solar_cycle