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Nashville, Tennessee – A G4 (Severe) geomagnetic storm, in effect for Jan. 20, is expected to reach Earth as a sharp Arctic cold outbreak moves into the Tennessee Valley, prompting utilities to closely monitor power systems during a period of elevated demand.
The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center says a coronal mass ejection, or CME, launched from the Sun late last week is forecast to arrive late Sunday into Monday. While the Tennessee Valley lies farther south than regions most exposed to geomagnetic effects, G4 storms can still influence large-scale power transmission systems, satellite operations, GPS accuracy, and radio communications…