NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Sunday, July 27, 2025 06:59:47 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) Geomagnetic Storms Likely on 02-03 July

Negative Polarity Coronal Hole 92
G1 (Minor) Geomagnetic Storms Likely on 02-03 July
published: Monday, July 04, 2016 23:34 UTC

The anticipated influence of a negative polarity coronal hole high speed stream is likely to cause isolated periods of G1 (Minor) geomagnetic storms late on 02 July and early on 03 July.