Is a Carrington event solar storm likely to happen again?

Understanding Carrington Event History

The Carrington Event of 1859 was a massive solar storm that occurred when a powerful coronal mass ejection (CME) hit the Earth’s magnetic field, causing widespread damage to telegraph systems and starting fires. This event was named after British astronomer Richard Carrington, who observed the solar flare that triggered the storm. The geomagnetically induced current (GIC) caused by the event was estimated to be around 1,000 times larger than the typical GIC.

Predicting and Preparing for the Next Event

Given the Sun’s 11-year solar cycle, scientists predict that a Carrington event is likely to occur again. The National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center (SWPC) is responsible for monitoring the Sun’s activity and providing forecasts. The SWPC uses a combination of solar and magnetic field measurements, as well as computer models, to predict the likelihood and potential impact of a solar storm. As part of its preparedness efforts, the U.S. government has developed a national plan to mitigate the effects of a Carrington-level event, which includes the development of surge protectors and the implementation of power grid controls.

Mitigating the Effects of a Carrington Event

To mitigate the effects of a Carrington event, power grid operators use a technique called “switching” to rapidly disconnect or isolate sections of the grid. This prevents the propagation of GICs and reduces the risk of equipment failure. Additionally, grid operators can use advanced software to monitor and control the grid in real-time, allowing them to respond quickly to changing conditions. By implementing these measures, power grid operators can minimize the impact of a Carrington event, protecting both the grid and the public.