May 6, 2025: (Spaceweather.com) If you’ve been enjoying the auroras of Solar Cycle 25, we’ve got good news. The next few solar cycles could be even more intense–the result of a little-known phenomenon called the “Centennial Gleissberg Cycle.” You’ve probably heard of the 11-year sunspot cycle. The Gleissberg Cycle is a slower modulation, which suppresses … Continue reading The Centennial Gleissberg Cycle