
THE CENTENNIAL GLEISSBERG CYCLE
SPACEWEATHER.COM NEWS: 05/07/2025
THE CENTENNIAL GLEISSBERG CYCLE: 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–a result of the 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 sunspot numbers every 80 to 100 years. For the past ~10 years, the sun has been near a low point in this cycle, but this is about to change.
New research published in the journal Space Weather suggests that the Gleissberg Cycle is waking up again. If this is true, solar cycles for the next 50 years could become increasingly intense.
“We have been looking at protons in the South Atlantic Anomaly,” explains the paper’s lead author Kalvyn Adams, an astrophysics student at the University of Colorado. “These are particles from the sun that come unusually close to Earth because our planet’s magnetic shield is weak over the south Atlantic Ocean.”

Above: The South Atlantic Anomaly (blue) is a weak spot in Earth’s magnetic field where particles from the sun can come relatively close to Earth [more]
It turns out that protons in the South Atlantic Anomaly are a “canary in a coal mine” for the Gleissberg Cycle. When these protons decrease, it means the Gleissberg Cycle is about to surge. “That’s exactly what we found,” says Adams. “The protons are clearly decreasing in measurements we obtained from NOAA’s Polar Operational Environmental Satellites.”
Protons in the South Atlantic Anomaly are just the latest in a growing body of evidence. Current sunspot counts are up; the sun’s ultraviolet output has increased; and the overall level of solar activity in Solar Cycle 25 has exceeded forecasts. It all adds up to an upswing in the 100-year cycle.
It also means that Joan Feyman was right. Before she passed away in 2020, the pioneering solar physicist was a leading researcher of the Gleissberg Cycle. She firmly believed that the centennial oscillation was responsible for the remarkable weakness of Solar Cycle 24 (2012-2013)–the cycle just before the current Solar Cycle 25. In a seminal paper published in 2014, she argued that the minimum of the Gleissberg Cycle fell almost squarely on top of Solar Cycle 24, turning it into the weakest cycle in 100 years. However, the tide was about to turn.
The resurgence of the Gleissberg Cycle makes a clear prediction for the future: Solar Cycles 26 through 28 should be progressively intense. Solar Cycle 26, peaking in ~2036, would be stronger than current Solar Cycle 25, and so on. The projected maximum of the Gleissberg Cycle is around 2055, aligning more or less with Solar Cycle 28.
“With a major increase in launch rates, it’ll be important to plan for changes to the space environment that thousands of satellites and spacecraft are flying through from all sides,” says Adams. “Solar activity and particle fluxes could all be very different in the decades ahead.”
For more information, read Adams’s original research here.
THE COUNTERINTUITIVE QUIET CONTINUES: Big sunspots usually produce big solar flares. This week, we’ve witnessed an exception to the rule. Giant sunspot 4079 has been strangely quiet, producing only a handful of puny C-class solar flares. If the quiet continues for a few more days, the sunspot will rotate off the sun’s western limb without having caused any significant space weather.

Mayan Calendar Synchronicity
13 Sun/AHAU is the Ascension of the Tzolk’in round and a day to honor the Wisdom of the Old Ones. The Cherokee Name is the Flower, the Wisdom of the ones who turn their faces to the Sun as it crosses the heart of sky. It’s a Good Day for Higher Wisdom of the Sun, and to See and Acknowledge a Divine Order of Time.
13 Sun/AHAU is the end that marks a new beginning – the Birth of a New Seed of Human Consciousness.
By the Christian calendar it’s Time to See and Acknowledge that God is present in all things that serve the Highest Good of the Whole.
“God is love; and he that dwelleth in love dwelleth in God, and God in him.”
(1 John 4:8 and 4:16)
THE TRECENA OF STAR/LAMAT: LIGHT MULTIPLIED TO ABUNDANCE
MAYAN CALENDAR DAYKEEPER’S JOURNAL
13 Sun/AHAU (ah ‘how, audio), Cherokee, Flower/Gun’tsi, Destiny Kin 260, Position 20 (zero)
May 7, 2025, 05/07/2025
A Day to Remember the Old Ones and the Inheritance of their wisdom.
THE TRECENA OF STAR/LAMAT: LIGHT MULTIPLIED TO ABUNDANCE
Visit the 13-Day Trecena Guide Page for the “Tzolk’in Field Guide: A Daily Practice for Personal Discernment.” My gift for the Tzolk’in round offers an overview for each 13-day trecena and the aspects of each day of the Tzolk’in round. The page also offers a link to resources for your own practice of counting the days to conceive your own discernment of the Meaning of Time.
THE END OF THE 4TH SEASON: The Star/LAMAT trecena completes the Tzolk’in round – VOLUME 2: Tzolk’in Seasons 3 and 4 (PUBLISHED SEPTEMBER 20, 2020)
13 Sun/Ahau (Cherokee, Flower/Gun’tsi) – Day 13 of 13 of the 1 Star/LAMAT trecena
Descriptions by Ian Xel Lungold (12 Sun/AHAU), wisdom and Tzolk’in calculator preserved on MayanMajix.com
Galactic Tone 13: Ascension; Thirteen assists us to go to the next higher step, propels us to try something new or to try again. Thirteen energy takes us over the next mountain just to see what is there. Thirteen carries the last success to the newest effort. Thirteen is a number associated with the Ascended Masters, creation, expansion, and manifestation.
Sun/Ahau: Day of the ancestors and connection to their guidance. The divine face of the sun – lord, musician, singer, dancer, and marksman. Suns are artistic, heroic athletes, visionaries with wise judgement who lead and defend the people. So much is expected from themselves and by other people that unfulfilled expectations are a certainty. An accumulation of these disappointments may lead Sun to evade responsibilities, not accept corrections and even build resentment and disdain towards others. Suns should simplify their lives to be able to rise and shine with unconditional love once again.
A GOOD DAY TO: Ask for the wisdom and continued honored memory of our Ancestors.
Cherokee, Flower/GUN’TSI EK: Symbol is the Sun, place of abode of Great Spirit. The Sun creates, nurtures and is the super communicator, the way station that relays messages and energy from other stars in the galaxy; provides energy for channeling information from the Ancestors; speaking the Living Language of Light, which ignites the consciousness in others. Gold is the color of courage and opportunity of wealth. Creative arts, master craftsman expressing divinity and wisdom through their creations. The face of the flower follows the Sun gathering the fire of creativity, illuminating harmony and balance, resonating peace and continuity within the human spirit. This is the Sign of the Chalice of the Infinite, Caldron of Creation.
[Text in italics was the primary source of inspiration for my journal. These are the sources that started my journey and they are the reference for interpretation each day. By providing the original text, I hope to offer a way to see what inspired my thoughts and by including all the aspects – allow for something more to inspire you. Mayan descriptions are those written by Ian Lungold. Cherokee descriptions came from multiple sources. Links to sources and other resources of study are offered on the Daykeeper Resources Page. ~Debra]
