Can solar storms disrupt GPS systems during outdoor activities?

Understanding Solar Storms and GPS Disruption

Solar storms, also known as space weather events, occur when a massive release of energy from the sun, often in the form of a coronal mass ejection (CME), interacts with the Earth’s magnetic field. This interaction can cause geomagnetically induced currents (GICs) in long-distance power lines, which can, in turn, disrupt GPS signals. A study by the University of Colorado Boulder found that a moderate geomagnetic storm can induce currents of up to 100 milliamps in a 1,000 km long power line.

History Lessons from the Carrington Event

The Carrington Event, a massive solar storm that occurred in 1859, provides a historic example of the potential impact of a severe space weather event on GPS systems. During this event, GICs caused telegraph systems to malfunction, and it’s estimated that a similar event today could cause widespread disruptions to modern technology, including GPS. The U.S. National Academy of Sciences recommends that the nation develop a plan to mitigate the effects of a Carrington-level event, which includes identifying and protecting critical infrastructure, such as GPS systems.

Mitigating the Risks of GPS Disruption

While it’s impossible to predict when the next Carrington-level event will occur, outdoor enthusiasts can take steps to mitigate the risks of GPS disruption. One approach is to use alternative navigation methods, such as dead reckoning or celestial navigation, in areas where GPS signals are known to be unreliable. It’s also essential to stay informed about space weather forecasts and warnings, which can be obtained from the National Weather Service’s Space Weather Prediction Center (SWPC) or other reputable sources.