NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, May 28, 2025 22:19:33 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

News Archive

Previous SWPC news items.

News Archive

Originally Posted
Aurora three day forecast A G1 Warning is in effect from 02/2005-03/0600 UTC Tuesday, August 2, 2016 - 21:02
G2 (Moderate) Watch Issued for 02 August Saturday, July 30, 2016 - 21:14
R1-Minor Flare Activity Observed Thursday, July 21, 2016 - 03:34
G1-Minor Geomagnetic Storms Observed Wednesday, July 20, 2016 - 02:17
G1 Minor storm conditions met at 12/0500 UTC G1 Minor storm conditions reached Tuesday, July 12, 2016 - 06:18

Pages