5 Ways a Geomagnetic Storm Could Crash Your GPS, Power Grid, and More
- A powerful geomagnetic storm, often triggered by solar flares from sunspots like AR3664, can disrupt Earth's magnetic field, directly interfering with GPS signals and causing navigation errors of up to several miles for planes, ships, and smartphone maps.
- The storm induces electric currents in long-distance power lines, potentially overloading transformers and triggering massive blackouts, similar to the 1989 Quebec outage that left 6 million people without electricity for hours.
- High-frequency radio communications, crucial for aviation and emergency services, can completely black out as the storm alters the ionosphere, cutting off contact with planes flying over oceans or remote areas.
- Satellites in low Earth orbit face increased drag from atmospheric expansion during the storm, risking derailing their orbits or even falling back to Earth prematurely, threatening global internet coverage and weather monitoring.
- A major geomagnetic storm can produce vivid auroras visible far beyond polar regions—even as far south as Florida or Mexico—but the breathtaking light show comes with a serious warning to charge your devices and prepare for potential 24- to 48-hour disruptions.