TL;DR
A solar eruption is expected to trigger geomagnetic activity sufficient for aurora borealis to be visible in up to 19 U.S. states tonight. Visibility depends on geomagnetic storm strength and clear skies. The event highlights the Sun’s influence on Earth’s atmosphere and sky-watching opportunities.
The aurora borealis may be visible in up to 19 U.S. states tonight as a result of a coronal mass ejection (CME) from the Sun interacting with Earth’s magnetic field. The event, confirmed by NOAA forecasts, could produce minor to moderate geomagnetic storms, increasing the chances of seeing the northern lights in regions further south than usual. This phenomenon is of interest to skywatchers and astronomers, especially in northern states, where clear, dark skies could reveal colorful displays.
The event began when the Sun released a CME, a cloud of magnetized plasma that travels through space and can take several days to reach Earth. According to NOAA’s forecast, the CME is expected to cause geomagnetic activity levels ranging from G1 (minor) to G2 (moderate), which are capable of producing visible auroras in areas outside the Arctic circle. The regions most likely to see the lights include northern parts of Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan, and Maine. In some cases, areas as far south as Oregon, Wyoming, Nebraska, Iowa, Illinois, Indiana, Ohio, New York, Vermont, and New Hampshire might experience faint auroras near the northern horizon, conditions permitting.
Visibility depends on several factors, including sky darkness, local weather, and the orientation of the interplanetary magnetic field. The forecast remains subject to change as real-time measurements of the solar wind and magnetic conditions become available during the night. Despite the moderate storm levels, the event offers a rare opportunity for many Americans to witness the aurora borealis without traveling to Arctic regions.
Why This Aurora Event Matters for Sky Enthusiasts
This event demonstrates the direct influence of solar activity on Earth’s magnetic environment and sky visibility. While G1 and G2 storms are considered minor to moderate, they can extend aurora visibility to lower latitudes, providing an unusual viewing opportunity for amateur astronomers and the general public. Such occurrences also serve as real-time reminders of space weather’s impact on communication, navigation, and power systems, even if only minor disruptions are expected.
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Background on Solar Activity and Aurora Visibility
Coronal mass ejections are frequent solar phenomena that send energized plasma into space. When Earth intercepts these clouds, they can cause geomagnetic storms, which in turn produce auroras. Historically, strong CMEs have caused spectacular displays at lower latitudes, but even moderate events like this can produce visible auroras in the U.S. during summer months when the nights are short and the sky remains bright after sunset. The current forecast builds on recent solar activity reports, which indicated increased CME emissions from the Sun’s active regions.
Typically, auroras are confined to polar regions, but geomagnetic storms of G1 or G2 levels can extend their reach. The last similar event occurred in 2023, when minor geomagnetic activity briefly illuminated northern skies. The current event is part of an ongoing pattern of solar activity cycles, which peak approximately every 11 years.
“The geomagnetic activity forecast indicates a G1 to G2 level, which could produce visible auroras in parts of the northern United States tonight.”
— NOAA Space Weather Prediction Center
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Factors That Could Affect Aurora Visibility Tonight
While forecasts predict G1 to G2 geomagnetic storms, the actual intensity and duration depend on real-time solar wind conditions and magnetic field orientation. The aurora’s visibility could be reduced by local weather, moonlight, or light pollution. Additionally, the forecast may change as the CME approaches and new data is collected, making the actual display unpredictable until the event unfolds.
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Monitoring Space Weather and Nighttime Conditions
Observers in the affected regions should monitor local weather forecasts and space weather updates throughout the night. If conditions remain favorable, clear, dark skies will maximize chances of seeing the aurora. NOAA and local astronomy groups are likely to provide real-time updates and photographs. The event’s outcome will be clearer by early morning, when observers can report sightings and scientists analyze the storm’s strength.
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Key Questions
When will the aurora borealis be visible in the U.S.?
The aurora may be visible tonight, June 29, 2026, in northern U.S. states, depending on geomagnetic activity and local weather conditions.
Which states are most likely to see the northern lights?
States near the U.S.-Canada border, including Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan, and Maine, have the highest chance.
Can I see the aurora with my phone camera?
Yes, modern cell phones with long exposure settings can often capture faint auroras that are hard to see with the naked eye, especially in dark, clear skies.
Will the moonlight affect the visibility of the aurora?
Yes, the current full moon and summer brightness can reduce the contrast, making faint auroras harder to see. Finding a dark location away from light pollution improves chances.
How long will the aurora display last?
The duration depends on the solar wind’s magnetic conditions, which can change during the night. The event may last a few hours or less, depending on the storm’s evolution.
Source: Google Trends
