Severe G4 Geomagnetic Storm Hits Earth, Triggering Auroras
• A severe G4 geomagnetic storm, triggered by a solar flare, has struck Earth, causing widespread auroras.
• The storm has disrupted satellite networks, power grids, and high-frequency communications, with Kp indices reaching
• Authorities are advising precautions for satellite and power grid operators, highlighting the importance of space weather forecasting.
Severe geomagnetic storm causes widespread disruptions
A severe G4 geomagnetic storm has hit Earth, triggered by a coronal mass ejection (CME) from an X1.9 solar flare that originated from sunspot region AR4341 on January 18, 2026. The CME arrived earlier than expected, impacting Earth's magnetic field at 1938 UTC (2:38 p.m. EST). This event has resulted in widespread auroral displays and significant disruptions to satellite networks, power grids, and high-frequency communications.
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