On Monday 15 September 2025, the National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center issued a G3 geomagnetic storm warning, the result of a large coronal hole sending increased solar winds at Earth. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Over the weekend, the northern lights were visible as far south as Maine and Connecticut , USA, as a moderate geomagnetic storm hit the planet. The storm, the result of a coronal hole spanning 500,000 kilometers ( 310,000 miles ) across the solar surface, has now reached G3 on the NOAA Space Weather Scale.

"Four sunspot regions are currently visible on the Earth-facing solar disc. The largest, in the northeast, features several large leading spots follow

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