Earth hit by strongest solar storm in 20 years
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Northern lights, solar
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The storm is also responsible for pushing the aurora farther south, giving some people across the southern U.S. a rare chance to see the northern lights.
The sun sure has woken up this week, unleashing a powerful X-class solar flare on Jan. 18 that hurled a colossal, fast-moving coronal mass ejection (CME) directly toward Earth. That CME has now arrived, triggering severe (G4) geomagnetic storm conditions far earlier than initially forecast.
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Powerful X1.9-class solar flare on January 18 triggers radio blackouts across the Americas
In terms of categorization of solar flare intensity, the letter X signifies the highest level of energy dissipated by the flare, with the letters A, B, and C signifying the first