Solar activity could reach its minimum as early as 2029

18:25

By: Azzat Manal

Solar activity could reach its minimum as early as 2029

Solar activity appears to be slowing more rapidly than previously expected, raising the possibility that the Sun could reach the minimum phase of its current cycle as early as 2029, according to observations from Russian solar researchers.

Scientists from Russia’s Solar Astronomy Laboratory, a research structure bringing together specialists from the Institute of Space Research and the Institute of Solar-Terrestrial Physics of the Russian Academy of Sciences, have reported a significant decline in solar activity over the past two years.

Their observations indicate that activity levels fell by almost three times between August 2024 and August 2026. The measured level dropped from 216 units in August 2024 to 76 units two years later, suggesting that the current solar cycle may be moving toward its quieter phase faster than earlier projections indicated.

The latest figures also differed noticeably from forecasts. Models had anticipated an activity level of approximately 90 units for August, while the actual measurement was 76. This represents a gap of nearly 16%, prompting researchers to reassess the expected timing of the cycle’s decline.

The solar minimum is the stage of the roughly 11-year solar cycle when the Sun reaches its lowest level of activity. Scientists monitor this process through several indicators, including the number of sunspots and the frequency and intensity of solar eruptions and other forms of solar activity.

A weaker period does not mean that the Sun becomes completely inactive. Even around solar minimum, eruptions and other space-weather phenomena can occur, although they generally become less frequent than during the peak of the cycle.

If the current decline continues, researchers believe the next solar minimum could arrive between one year and 18 months earlier than previously anticipated. Under that scenario, the low point could occur around 2029.

The timing of solar minimum is important for scientists because changes in solar activity influence the space environment around Earth. Solar radiation and eruptions can affect satellites, spacecraft, radio communications and navigation systems, while periods of heightened activity can also increase the likelihood of auroral displays at lower latitudes.

However, the expected minimum would only represent one stage in the Sun’s long-term cycle. Following a period of reduced activity, solar activity is expected to rise again as the star moves toward its next maximum.

Russian researchers also suggest that the longer-term evolution of the Sun could eventually lead to a particularly active period later in the 21st century. Some projections point to a possible major solar maximum around the middle of the century, although the exact intensity and timing remain uncertain.

Solar cycles are difficult to predict precisely because the Sun is a complex and constantly changing magnetic system. Scientists therefore continue to compare observations with forecasting models in order to refine their understanding of how quickly the current cycle is evolving.

The latest observations do not establish a definitive date for the next solar minimum, but they indicate that the decline in activity deserves close monitoring. Future measurements will determine whether the recent slowdown represents a temporary fluctuation or a sustained acceleration toward the cycle’s next low point.