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Massive S4 Solar Storm Threatens Satellites and GPS

1/20/2026

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Summary

Story summary

A powerful solar radiation storm rated S4, the largest in over 20 years, is heading toward Earth.
The geomagnetic storm began affecting Earth on Monday afternoon as coronal mass ejections reached the planet.
The storm could disrupt satellite communications and GPS accuracy.
The National Weather Service's Space Weather Prediction Center warned airlines and space agencies of potential technology impacts.

History

Historical Context

In 1989, a geomagnetic storm caused a major blackout in Quebec, affecting over 6 million residents. The 2003 Halloween solar storms, among the most intense recorded, produced powerful flares and auroras visible as far south as Texas. Today’s S4 solar radiation storm poses similar risks, highlighting the need for preparedness against potential disruptions to satellite communications and power grids.

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Story summary

A powerful solar radiation storm rated S4, the largest in over 20 years, is heading toward Earth.
The geomagnetic storm began affecting Earth on Monday afternoon as coronal mass ejections reached the planet.
The storm could disrupt satellite communications and GPS accuracy.
The National Weather Service's Space Weather Prediction Center warned airlines and space agencies of potential technology impacts.

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