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We email you only when conditions cross your chosen G-scale threshold. Silence means calm skies.

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Alert me at G3 (Strong) — HF radio and GPS degradation possible G4 (Severe) — Widespread voltage control problems, GPS degraded G5 (Extreme, default) — Grid collapse possible, HF radio blackout

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Data: NOAA SWPC, GOES, ACE/DSCOVR, NASA DONKI · Privacy policy · Manage alerts