Here’s how a solar storm could take down the internet, GPS, and cause satellites to fall
Typical amounts of solar particles hitting the Earth’s magnetosphere can be beautiful, but too much could be catastrophic
The geomagnetic storm that began on May 10, 2024, generated stunning aurora borealis, more commonly known as the northern lights, that could be seen as far south as Mexico. They also generated headaches for farmers whose GPS-guided tractors were idled in the middle of planting season.
Geomagnetic storms occur when a large bubble of superheated gas called plasma is ejected from the surface of the Sun and hits the Earth. This bubble is known as a coronal mass ejection. The plasma of a coronal mass ejection consists of a cloud of protons and electrons, which are electrically charged particles. When these particles reach the Earth, they interact with the magnetic field that surrounds the planet. This interaction causes the magnetic field to distort and weaken, which in turn leads to the strange behavior of the aurora borealis and other natural phenomena.
The May 2024 storm, rated G5 on the National Oceanic and Atmospheric Administration’s 1-to-5 Geomagnetic Storms scale, disrupted GPS communications enough to throw off tractor guidance, which requires centimeter-level precision. Stronger storms would have much more serious consequences. As an electrical engineer who specializes in the power grid, I study how geomagnetic storms also threaten to cause power and internet outages and how to protect against that.
Geomagnetic storms
Stronger solar storms have happened, and one caused havoc with one of the earliest electronic technologies. On September 1 and 2, 1859, telegraph systems around the world failed catastrophically. The operators of the telegraphs reported receiving electrical shocks, telegraph paper catching fire, and being able to operate equipment with batteries disconnected. During the evenings, the aurora borealis could be seen as far south as Colombia. Typically, these lights are only visible at higher latitudes, in northern Canada, Scandinavia and Siberia.
What the world experienced that day, now known as the Carrington Event, was the large
