NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, April 09, 2025 12:15:58 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

Solar Radiation Storms at S1-S2 (Minor-Moderate) Levels - 23 March 2024

Solar Radiation Storms at S1-S2 (Minor-Moderate) Levels - 23 March 2024
published: Monday, March 25, 2024 17:40 UTC
The greater than 10 MeV proton flux became enhanced beginning at around 23/0400 UTC, following an X1.1 flare at 23/0133 UTC from Region 3614 (N17W00, Dso/beta). Flux values exceeded the S1 (Minor) threshold at 23/0815 UTC and the S2 (Moderate) threshold at 23/1405 UTC. Solar radiation storms at S1-S2 levels are expected to continue through the remainder of 23 March and persist into 24 March.