Table 7 Sunspot number (SSN) statistics from the fbprophet model. The SSN for 2020–2025 are model estimates incorporating observed data up to the present, while values for 2026–2036 are out-of-sample forecasts for Cycles 25 and 26.
From: Forecasting the number of sunspots for solar cycle 25 utilizing the facebook prophet model
Years | Yearly means of SSN | Standard error of yearly mean SSN | Confidence interval lower bound | Confidence interval upper bound |
|---|---|---|---|---|
Cycle 25 | ||||
2020 | 8.0 | 1.27 | 5.5 | 10.5 |
2021 | 33.2 | 3.65 | 26.1 | 40.4 |
2022 | 84.0 | 4.56 | 75.1 | 92.9 |
2023 | 123.0 | 1.44 | 120.2 | 125.9 |
2024 | 150.6 | 2.69 | 145.3 | 155.9 |
2025 | 116.8 | 6.35 | 104.3 | 129.2 |
2026 | 85.3 | 13.51 | 58.8 | 111.8 |
2027 | 67.3 | 13.60 | 40.7 | 94.0 |
2028 | 49.8 | 13.62 | 23.1 | 76.5 |
2029 | 36.1 | 13.51 | 9.6 | 62.6 |
2030 | 27.0 | 13.59 | 0.4 | 53.7 |
Cycle 26 | ||||
2031 | 26.4 | 13.53 | -0.1 | 52.9 |
2032 | 36.1 | 13.69 | 9.2 | 62.9 |
2033 | 60.6 | 13.56 | 34.0 | 87.2 |
2034 | 83.3 | 13.59 | 56.7 | 109.9 |
2035 | 98.3 | 13.51 | 71.8 | 124.7 |
2036 | 91.7 | 13.52 | 65.2 | 118.2 |
