CME Arrival Triggers G4 Geomagnetic Storm Watch for Jan 20
TL;DR Summary
NOAA’s Space Weather Prediction Center has issued a G4 (Severe) Geomagnetic Storm Watch for January 20 due to a coronal mass ejection released January 18 in association with an energetic solar flare; the CME is expected to reach Earth from late January 19 to early January 20, with storm levels potentially ranging from G1 to G3 upon arrival and the passage likely continuing through January 20, with residual effects possible on January 21. Forecasters have a fair degree of confidence in the timing and will provide updates as conditions evolve.
- G4 (Severe) Geomagnetic Storm Watch for 20 January UTC-Day NOAA Space Weather Prediction Center (.gov)
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- Northern lights may be visible tonight. How to see the aurora in Iowa. The Des Moines Register
- How to look for northern lights in Massachusetts tonight The Boston Globe
- Northern lights may be visible in 24 states tonight as massive CME races toward Earth Space
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