NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, August 29, 2025 14:22:26 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

G1 (Minor) Watch Issued for 22 May 2016

G1 (Minor) Watch Issued for 22 May 2016
published: Monday, May 23, 2016 17:07 UTC

A G1 (Minor) geomagnetic Watch is in effect for the 22 May due to a disturbed interplanetary magnetic field related to a positive polarity coronal hole high speed stream. Continue to monitor our SWPC website for any changes to the forecast.