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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 11, 2025 23:46:08 UTC

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NOAA Scales mini

R1 (Minor) Radio Blackout Impacts
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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

Geoalert - Alerts, Analysis and Forecast Codes

Users of the coded GEOALERT report include members of the International Space Environment Service (ISES), a multinational partnership of agencies sharing observed space weather data and collaborating on forecasts. The GEOALERT is a final daily report containing the compilation of observed conditions, as well as a one day forecast.

The GEOALERT message contains four coded messages and sometimes plain text.

UGEOA: The World Warning Agency (WWA) consensus forecast for 1- to 3-day
forecasts of whole-disk flares, geomagnetic activity, and protons.

UGEOE: A summary of significant solar events for the previous day.

UGEOI: Observed solar-geophysical indices for the previous day.

UGEOR: Sunspot data for the previous day, and regional forecasts.

Current day GEOALERT.

Details about the GEOALERT page are available.

Details about the GEOALERT page are available.

 

https://services.swpc.noaa.gov/text/geoalert.txt

Current and previous GEOALERT text are available here.