Charleston, West Virginia – A rare G4 (Severe) solar storm is expected to impact Earth on Jan. 20, prompting increased monitoring of West Virginia’s power grid and other critical infrastructure as federal space weather officials track incoming solar activity.
According to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center, a coronal mass ejection (CME) launched from the Sun late last week is forecast to arrive late Sunday into Monday. G4-level geomagnetic storms are uncommon and can interfere with power transmission systems, satellite operations, GPS accuracy, and some radio communications, particularly across regions with rugged terrain and long transmission corridors.
West Virginia’s mountainous geography, coal- and gas-linked power infrastructure, and role as a regional transmission pass-through increase the importance of grid stability during severe space weather events. While the state lies south of the most geomagnetically exposed areas, NOAA officials emphasize that widespread power outages are not expected, though utilities may take precautionary actions to protect sensitive equipment.
For most residents, the solar storm itself will not be noticeable. Experts explain that geomagnetic activity can introduce electrical currents into long-distance transmission lines, slightly reducing the grid’s margin for error. Grid operators may increase monitoring, adjust loads, or implement protective measures if conditions intensify.
Cell phone service and internet connectivity are expected to remain largely unaffected. However, minor GPS inaccuracies are possible, particularly affecting aviation, rail operations, and precision timing systems used by utilities and emergency services.
As a secondary effect, auroras may be visible across northern or higher-elevation areas of West Virginia, especially if geomagnetic activity strengthens beyond current forecasts.
NOAA forecasters say geomagnetic activity could persist at lower levels into Tuesday.
