A fast-moving solar event detected by NOAA has sharply increased the chances of seeing the northern lights across large parts of the United States on Thursday night into early Friday morning. Forecasters upgraded the incoming disturbance to a G2 geomagnetic storm after an Earth-directed coronal mass ejection was observed leaving the Sun. The timing is especially favorable for skywatchers because the Moon is approaching its new phase, leaving skies darker and making even faint aurora displays easier to spot. If conditions align, millions of Americans across northern and central states could witness one of the most widespread aurora events of the year.
A Solar Blast From The Sun Changed The Forecast
The upgraded forecast follows the detection of a coronal mass ejection, or CME, launched from the Sun after increased solar activity earlier this month. Scientists monitor these eruptions closely because they can send clouds of charged particles directly toward Earth. When those particles collide with Earth’s magnetic field, they can trigger geomagnetic storms capable of producing vivid aurora displays far from the Arctic Circle. According toNOAA’s Space Weather Prediction Center, the storm is now expected to reach G2 intensity, a moderate level strong enough to push aurora visibility farther south than usual. The best viewing window is currently forecast between 10:00 p.m. EDT Thursday and 1:00 a.m. EDT Friday. During that period, skies in northern states may glow with moving curtains of green, red, and purple light stretching low across the horizon. Stronger bursts of solar activity could temporarily intensify the display and expand visibility even farther south.
States Across The Northern U.S. Could See The Aurora
The upgraded geomagnetic forecast dramatically expands the potential viewing zone for the aurora borealis. Under weaker G1 storm conditions, the northern lights would mostly remain confined to states near the Canadian border, including Montana, North Dakota, Minnesota, Wisconsin, Michigan, and Maine. With the new G2 forecast, visibility may extend into parts of Oregon, Wyoming, Nebraska, Iowa, Illinois, Indiana, Ohio, New York, Vermont, and New Hampshire. In ideal conditions, people located away from city lights may only need a clear northern horizon to spot faint aurora activity. Cameras and modern smartphones can also reveal colors invisible to the naked eye, allowing even subtle displays to appear dramatic in photographs. Weather conditions will still play a major role, and cloud cover could block visibility in some regions. Skywatchers are being encouraged to monitor local forecasts while checking real-time aurora maps throughout the evening.
Why The Sun Is Becoming More Active Again
Solar scientists have observed a renewed rise in activity on the Sun after several quieter weeks. On May 7, an M2-class solar flare erupted from an active sunspot region, signaling that the Sun’s magnetic activity was intensifying again. Solar flares and CMEs are both driven by unstable magnetic fields twisting above sunspots, which are cooler and darker areas on the Sun’s visible surface. The Sun is currently approaching the peak phase of its approximately 11-year solar cycle, a period marked by more frequent eruptions and stronger space weather events. This growing activity explains why aurora displays have become more common and more intense over the past year. Some recent geomagnetic storms have produced aurora sightings far deeper into the continental United States than usual, including regions that rarely experience visible northern lights. Scientists expect additional solar events in the coming weeks as active sunspot regions rotate back into Earth-facing position.
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