Space Weather Prediction Center
12/07/2025 | News release | Distributed by Public on 12/06/2025 22:59
Strong (G3) Geomagnetic Storm WATCH Valid for 09 Dec 2025
A full-halo coronal mass ejection (CME), associated with an M8.1 flare from Region 4299 at 20:39 UTC on 06 December, is expected to impact Earth early to midday on 09 December, potentially causing periods of G3 (Strong) geomagnetic storming.
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