Aurora Display Tonight: A rare and spectacular celestial event is on the horizon. Tonight, August 19, 2025, the Northern Lights, also known as aurora borealis, are predicted to grace the skies over more than a dozen US states. This extraordinary occurrence is attributed to a geomagnetic storm, ranging from a minor (G1) to strong (G3) level, resulting from heightened solar activity.
Understanding the Geomagnetic Storm
The impending aurora display is a direct consequence of a geomagnetic storm impacting Earth’s magnetic field. According to TS2 Space, this storm is driven by either a high-speed stream of solar wind or coronal mass ejections (CMEs) originating from the sun. These solar phenomena release vast amounts of energy and charged particles into space, which, when directed towards Earth, interact with our planet’s magnetosphere. The strength of the storm, classified between G1 (minor) and G3 (strong), dictates the intensity and geographical extent of the aurora borealis.
Solar Wind and CMEs
Solar wind is a continuous stream of charged particles emanating from the sun. Coronal mass ejections (CMEs) are larger, more sporadic eruptions of plasma and magnetic field from the sun’s corona. Both can trigger geomagnetic storms when they collide with Earth’s magnetosphere. The impact compresses the magnetosphere, accelerating charged particles down magnetic field lines towards the polar regions. These particles then collide with atoms and molecules in the Earth’s upper atmosphere, exciting them and causing them to emit light – the aurora borealis.
Prime Viewing Locations
Several states are favorably positioned to witness this breathtaking spectacle. USA Today reports that the list includes Alaska, Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan, Maine, Vermont, New Hampshire, and New York. Additionally, there is potential visibility in Iowa, and northern regions of Wyoming and Illinois. To maximize your chances of seeing the aurora, Travel + Leisure recommends seeking out dark, north-facing locations away from the disruptive glare of city lights.
Optimal Viewing Times
Timing is crucial for aurora viewing. Time Out suggests that the best time to look for the lights is after darkness falls, roughly between 10 p.m. and 4 a.m. local time. Peak activity is anticipated around midnight to the early morning hours. Patience is key, as the aurora’s intensity can fluctuate. It is also advisable to check local weather forecasts to ensure clear skies, as cloud cover will obstruct the view.
Tips for Aurora Hunting
Successfully spotting the Northern Lights requires some preparation and knowledge. Space.com emphasizes the importance of minimizing light pollution. The darker the location, the more likely you are to see the faint glow of the aurora. Using a compass app on your smartphone can help you find a north-facing vantage point. Allow your eyes to adjust to the darkness for at least 20 minutes to enhance your night vision.
Capturing the Moment
If you plan to photograph the aurora, a camera with manual settings is essential. A wide-angle lens and a sturdy tripod are also recommended. Use a low aperture (e.g., f/2.8 or lower) to let in as much light as possible, and set the ISO to a high value (e.g., 800 or higher), but be mindful of noise. Experiment with different exposure times, typically ranging from a few seconds to 30 seconds, to capture the aurora’s dynamic movements. Remember to focus manually on the stars or a distant object, as autofocus may struggle in low light conditions.
The Science Behind the Lights
The colors of the aurora are determined by the type of gas molecules that are excited by the charged particles. The most common color is green, produced by oxygen at lower altitudes. Red auroras are also produced by oxygen, but at higher altitudes. Blue and violet auroras are caused by nitrogen. The specific colors and patterns of the aurora can vary depending on the energy and composition of the solar wind or CME.
Geomagnetic Storm Scales
Geomagnetic storms are classified on a scale from G1 (minor) to G5 (extreme). A G1 storm can cause minor fluctuations in power grids and have a small impact on satellite operations. A G3 storm, like the one predicted for tonight, can cause more significant power grid irregularities, disrupt satellite navigation, and extend the aurora’s visibility further south. G4 and G5 storms can have even more severe consequences, including widespread power outages and communication disruptions.
Stay Informed
Events like this are dynamic and can change. CBS Minnesota and other news outlets will likely provide updates as the evening progresses. Keep an eye on space weather forecasts and real-time aurora maps for the latest information. While predicting the exact intensity and location of the aurora is challenging, these resources can help you make informed decisions about where and when to look.
Aurora Borealis: A Night to Remember
The anticipated Northern Lights display on August 19, 2025, presents a unique opportunity to witness one of nature’s most captivating phenomena. By understanding the science behind the aurora, choosing an optimal viewing location, and staying informed about the latest forecasts, you can significantly increase your chances of experiencing this unforgettable event. This celestial spectacle serves as a reminder of the powerful connection between the sun and our planet, and the beauty that can arise from their interaction.
