NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Tuesday, June 24, 2025 17:32:51 UTC

Main menu

NOAA Scales mini

R1 (Minor) Radio Blackout Impacts
close
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

New Solar Cycle Progression Plots to replace Legacy Plots

New Solar Cycle Progression Plots to replace Legacy Plots
published: Friday, July 10, 2020 16:05 UTC

New solar cycle progression plots and JSON files will permanently replace the former (legacy OUS) style solar cycle products. These new plots are interactive and allow for much easier examination of data. The legacy solar cycle products will be discontinued and also no longer available in our Weekly product beginning July 1st, 2020.