Sunspot 4341 erupted Jan 18 (18:09 UTC), unleashing a long-lasting X1.9 flare captured by NASA Solar Dynamics Observatory. The blast ionized Earth’s atmosphere, causing shortwave radio blackouts across the Americas. Even bigger: a full-halo CME with an Earth-directed punch. Models show arrival early Jan 20, with a possible G3 geomagnetic storm and mid-latitude auroras.
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