Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Predicted Sunspot Number And Radio Flux

Date Sunspot Number Predicted Sunspot Number 25th Sunspot Number 50th Sunspot Number 75th 10.7 cm Radio Flux Predicted 10.7 cm Radio Flux 25th 10.7 cm Radio Flux 50th 10.7 cm Radio Flux 75th

Multi-year forecast of the smoothed monthly sunspot number and the smoothed monthly F10.7.  For further details see Solar Cycle Progression.

Space Weather and GPS Systems
HF Radio Communications
Satellite Drag

Multi-year forecast of the smoothed monthly sunspot number and the smoothed monthly F10.7. For further details see Solar Cycle Progression.

For product history see Solar Cycle Progression.

Predicted Solar Cycle: Sunspot Number And Radio Flux Values with Expected Ranges

Predicted Solar Cycle Data (JSON)​

Sources

  • S.I.D.C. Brussels International Sunspot Number, Data Files.​
  • Penticton, B.C., Canada: 10.7cm radio flux values (sfu), Data Files.
  • Predicted values are based on the consensus of the Solar Cycle 25 Prediction Panel​

Fields (JSON)

  • time-tag: yyyy-mm
  • predicted_ssn: predicted sunspot number
  • high25_ssn: predicted sunspot number 25th percentile high range
  • low25_ssn: predicted sunspot number 25th percentile low range
  • high_ssn: predicted sunspot number high range
  • low_ssn: predicted sunspot number low range
  • high75_ssn: predicted sunspot number 75th percentile high range
  • low75_ssn: predicted sunspot number 75th percentile low range
  • predicted_f10.7: predicted f10.7cm value
  • high25_f10.7: predicted f10.7cm 25th percentile high range
  • low25_f10.7: predicted f10.7cm 25th percentile low range
  • high_f10.7: predicted f10.7cm high range
  • low_f10.7: predicted f10.7cm low range
  • high75_f10.7: predicted f10.7cm 75th percentile high range
  • low75_f10.7: predicted f10.7cm 75th percentile low range