Fig. 3
From: Forecasting the number of sunspots for solar cycle 25 utilizing the facebook prophet model
Extended sunspot number forecast for Solar Cycles 25 and 26 (2018–2040) using the Prophet time series forecasting model. The blue line represents historical sunspot data, while the orange and purple lines show forecasts for Cycles 25 and 26 respectively. Shaded regions indicate 95% confidence intervals. The model incorporates spotless months and solar minima as holiday effects to improve forecasting accuracy. Vertical dashed lines mark the predicted peaks for both cycles, with Cycle 25 peak around mid-2025 and Cycle 26 peak anticipated in the early 2030s.
