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NOAA Issues Geomagnetic Storm Watch After Strong Solar Flares
NOAA forecasts minor to moderate geomagnetic storms with potential impacts on power grids, satellites, and radio communications from solar flares and coronal mass ejections in early November.
- On Nov. 4, 2025, the Sun erupted with two X-class flares, X1.8 from Active Region 4274 and X1.1 beyond the east limb, causing strong radio blackouts across the Americas and the Pacific.
- Region 4274, a magnetically complex sunspot cluster with a beta-gamma-delta magnetic configuration, is rotating into a more Earth-facing position during the Sun's active phase, raising flare risks.
- Both flares also launched coronal mass ejections largely off the limb; the X1.8 flare produced Type IV radio emissions, a 160 sfu Tenflare, and a partial halo CME visible in coronagraph imagery.
- NOAA is warning of minor G1 to moderate G2 geomagnetic storming late Nov. 6 into Nov. 7, with a glancing shock possibly merging with a coronal hole high-speed stream and auroras visible in 14 U.S. states.
- Because CMEs travel slowly, the SWPC has raised flare probabilities to 65% for M-class and 15% for X-class flares through November 7, with ongoing activity confirmed by an M7.4 flare on Nov. 5.
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Coverage Details
Total News Sources45
Leaning Left4Leaning Right7Center9Last UpdatedBias Distribution45% Center
Bias Distribution
- 45% of the sources are Center
45% Center
L 20%
C 45%
R 35%
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