Northern lights to dazzle sky across 10 U.S. states due to geomagnetic storm

On September 21, 2025, a notable geomagnetic storm is expected to result in the visibility of the aurora borealis across multiple states in the continental U.S. and Alaska. According to a forecast from the National Oceanic and Atmospheric Administration (NOAA), the Kp index is predicted to reach a level of four out of nine, increasing the likelihood of a vibrant display known for its motion and formations. The auroral activity is pronounced, suggesting viewers in these states have a high chance of witnessing this natural phenomenon in the night sky. Specifically, states along the U.S.-Canadian border, including northern Washington, northern Idaho, most of Montana, North Dakota, and northern South Dakota, are likely to experience visibility of the northern lights. Additionally, much of the upper Midwest is also included, with states such as Minnesota, Wisconsin, and northern Michigan being prime candidates for the view. On the East Coast, northern Maine residents might also have the opportunity to see the aurora, and most of Alaska is in the range of those likely to observe this spectacular sight. The forecast predicts that the geomagnetic storm's influence is primarily linked to high-speed solar winds originating from coronal holes on the Sun, where solar winds can escape from cooler regions into space. This phenomenon results in disturbances in Earth’s magnetic field, further enhancing the auroral displays. For the best experience, it is recommended that viewers seek locations away from city lights and towards areas with an unobstructed view of the northern sky, with optimal viewing times suggested between 10 p.m. and 2 a.m. As excitement builds among the public regarding the anticipated visibility of the northern lights, it is clear that this event represents an extraordinary opportunity for many individuals across the northern states and parts of Alaska. It enhances the cultural appreciation for such natural exhibitions and emphasizes the need to preserve dark skies for optimal viewing of astronomical phenomena like the aurora borealis.