Incredible images of the Northern Lights 2024-05-12 22:22:42

“We are almost certain that charged solar particles ejected from the Sun’s corona are headed toward Earth,” Sean Dahl of the Space Weather Prediction Center (SWPC) explained at a press conference.

The Center has issued a Category 4 (on a scale of five) geomagnetic storm warning, which has not happened since 2005. It is difficult to predict the exact start of the phenomenon, but it will last through the weekend.

“It can affect infrastructure,” Dahl said, clarifying that this phenomenon is “very rare.” “We’ve notified all the providers we work with, those that operate satellites, communications and, of course, the North American power grid,” he added.

The Sun is currently near the peak of its activity based on its 11-year cycle. These coronal mass ejections, of which at least seven are directed toward Earth, originate from a sunspot about 16 times the diameter of Earth. They move at a speed of several hundreds of kilometers per second. When they reach the American satellites it will be possible to predict more precisely the intensity of the phenomenon, that is about 20-45 minutes before it reaches the Earth, explained Sean Dahl.

Dahl advised Americans to stock up on batteries or even generators, as they do for all storms.

Electricity providers have been working to better protect their grids for a decade, said Rob Steenberg, a scientist working at SWPC. Power lines can be affected, not homes, and today there are systems in place to avoid them. The GPS network could also be affected.

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As for air traffic, the FAA does not expect any major problems. The SWPC noted that some aurora may appear in the sky, even in areas where this phenomenon is not common, and advised residents to … take pictures. “If you’re in an area where it’s dark, cloudless, and with minimal light pollution, you’ll be able to see very impressive auroras,” Steenberg said. “And that’s the gift of space meteorology.”


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