Level S4 solar radiation event
G4 (Severe) Geomagnetic Storm Levels Reached 19 Jan, 2026
published: Monday, January 19, 2026 20:09 UTC
G4 Levels were first reached at 2:38pm EST (1938 UTC) on 19 January, 2026 upon CME shock arrival. CME passage is expected to continue through the evening with G4 levels remaining possible.
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