Scientists Predict Solar Cycle Strength Years in Advance with New Method

Scientists have introduced a novel forecasting method that predicts the strength of upcoming solar cycles with unprecedented lead time. Published in a new study, this technique utilizes a mathematical approach called Hilbert transform to analyze sunspot data dating back to 1749. By mapping irregular solar cycles onto a uniform 'clock face,' researchers identified a pattern: extreme space weather events do not gradually subside but cease abruptly at a specific point in each cycle.

This abrupt cessation point, researchers found, is closely linked to the maximum sunspot count of the subsequent cycle. The new method has been validated retrospectively across 25 solar cycles, explaining over 80% of the variations between them. A key advantage is its ability to provide predictions approximately six to seven years before a cycle's peak, even before the preceding cycle concludes.

Applying the model to current data, scientists correctly predicted that the 25th solar cycle, which peaked in May 2024 with powerful geomagnetic storms, would be stronger than many earlier forecasts suggested. The model's initial forecast for the 26th cycle indicates it will be weak to moderate, with a maximum sunspot count around 100-120, similar to or weaker than the current cycle. More precise predictions will become available in about three years when the 25th cycle reaches its cessation point.