A geomagnetic storm on Sept. 1 may cause Northern Lights visible as far south as Pennsylvania and Oregon.

A geomagnetic storm is expected to hit Earth on September 1, 2025, potentially making the Northern Lights visible in parts of the U.S. as far south as Pennsylvania and Oregon. The storm, caused by a coronal mass ejection from the sun, could create a G3-level geomagnetic storm, leading to a vibrant aurora display. The best viewing time will be Monday night through Tuesday morning, with clear skies away from city lights offering the best chance to see the phenomenon. The storm could disrupt satellites and power grids but promises a rare spectacle of dancing lights in the sky.