Northern lights expected across 18 U.S. states amid strong geomagnetic storm

The United States is experiencing a rare astronomical event as a powerful geomagnetic storm is expected to impact the magnetic field late on September 1, 2025, into early September 2. This unusual phenomenon is attributed to a coronal mass ejection (CME) from the sun, which has released a significant burst of charged particles. The National Oceanic and Atmospheric Administration (NOAA) has projected that this geomagnetic activity could allow the northern lights, also known as auroras, to be visible as far south as Nebraska and Iowa, with predictions indicating visibility across 18 U.S. states, including Montana, North Dakota, and Michigan. It is essential for individuals in these states to be aware of the conditions and look towards the northern horizon after dark for the best chance of witnessing the light show. The northern lights are typically visible in higher latitudes, but due to the strength of this storm, which NOAA categorizes as G3 on a scale of G1 to G5, areas much further south will have an opportunity to view the spectacle. The Kp index, which measures auroral activity, could reach a high of 6, indicating a bright and active display. Although this event is not anticipated to reach the intensity of the extreme G5 storms observed in 2024, it does present a unique viewing opportunity for observers in the Midwest and other regions typically outside the aurora zone. As space weather models predict this storm, NOAA advises the public to remain vigilant and check forecasts regularly. The storm could lead to slight disruptions in satellite operations and navigation systems but is generally manageable. It arises after a series of solar flares and related solar activity, reflecting the sun's current cycle of heightened magnetic activity, which could last through the end of the year. In communities with urban light pollution, those wanting to catch a glimpse of the northern lights are encouraged to venture to areas with less light interference and clearer skies. Many are excited, anticipating how long the light show may last if weather conditions cooperate. Although clouds may hinder visibility in some locations, especially in regions prone to overcast skies, there remains a good chance for clear viewing in areas with optimal conditions. Consequently, this forecast is generating buzz among astronomers and casual viewers alike, as they prepare for a night of stargazing that may reveal the beautiful celestial display of auroras from the U.S. states rarely afforded this opportunity.