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Aurora borealis northern lights produced solar geomagnetic

July 4 Aurora Lit 30 States as G3 Solar Storm Beat NOAA Forecast by Two Levels

Aurora borealis covered more than 30 US states on July 4, 2026 — reaching as far south as New Mexico and Northern California — after a G3 geomagnetic storm hit two levels stronger than NOAA's G1 forecast. The miss traces to a sensor gap at the L1 Lagrange point, where solar wind orientation is only measurable 15 to 60 minutes before impact.

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