NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, September 18, 2025 23:49:41 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 Influence Continues Saturday, September 13, 2014 - 14:26
A picture of the aurora over top of a dome structure in the snow Receive SWPC alerts and warnings Saturday, September 13, 2014 - 00:17
G3 (Strong) Geomagnetic Storm Underway Friday, September 12, 2014 - 23:29
NOAA Aurora Spotters on flickr Friday, September 12, 2014 - 22:16
G2 (Moderate) Storming Underway Friday, September 12, 2014 - 18:06

Pages