Warnings about Hurricane Milton hitting Florida have dominated news reports this week. But there have been warnings from forecasters with the U.S. National Oceanic and Atmospheric Administration’s Space Weather Prediction Center about another storm brewing: a severe geomagnetic storm.
What is a geomagnetic storm?
According to Jonathan Blazek, an assistant professor of physics at Northeastern University, these events are triggered by a coronal mass ejection, which is when the sun lets off a mass ejection of particles. Sometimes, these particles hit Earth and interact with our magnetic field and upper layers of the atmosphere. This, Blazek says, is a geomagnetic storm.
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