NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, July 26, 2025 16:24:35 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
CME Passage Continues Today, 16 Apr 2025 CME Passage Continues Today, 16 Apr 2025 Wednesday, April 16, 2025 - 14:34
G3 Watch for 16 Apr 2025 Monday, April 14, 2025 - 17:51
New Coronagraph Page Available New Coronagraph Page Available Tuesday, April 8, 2025 - 16:07
R2 Moderate radio blackout/GOES SUVI imagery R2 (Moderate) HF Radio Blackout Event on 01 Apr, 2025 Tuesday, April 1, 2025 - 07:09
S1 Storm on 31 March S1 (Minor) Storm on 31 March Monday, March 31, 2025 - 21:17

Pages