Forecast indicates aurora borealis possible on the night of April 29th to 30th in high latitudes

A flow of fast solar wind from a coronal hole is expected to reach Terra between April 29 and 30. The condition can elevate geomagnetic activity to unstable or active levels. Especialistas predict a chance of a smaller geomagnetic storm, classified as G1.

The phenomenon opens a window for observing the aurora borealis. Visibilidade remains concentrated at high latitudes. Regiões like Alasca, Canadá and north of Escandinávia have the best chances. In cases of strengthening, the show may advance a little further south.

Coronal Hole Solar Vento Boosts Forecast

The increase in solar wind speed comes from a structure known as a coronal hole. Essas regions in Sol’s atmosphere release faster-than-normal streams. Quando reach the Earth’s magnetic field, they can cause disturbances.

Previsões from NOAA’s Space Weather Prediction Center indicates transition from calm to unstable conditions. Activity should persist until the 30th. Já on May 1st, the trend is for a gradual reduction.

• Coronal Buraco releases denser and faster solar wind
• Impacto expected between the afternoon of the 29th and the early morning of the 30th
• Chance index Kp rise to levels that favor aurora
• Tempestade G1 Enables Visibility Beyond the Arctic Circle
• Condições still depend on clear skies and absence of light pollution

Locais with highest observation probability

Observadores in high latitude areas has the most favorable conditions. No Alasca, northern parts of Canadá and Escandinávia, the phenomenon tends to appear with more intensity.

Nos Estados Unidos, the aurora can be seen on the northern horizon of states such as Alasca, Washington, Idaho, Montana, Dakota from Norte, Dakota from Sul, Minnesota, Wisconsin, Michigan and Maine. In some scenarios, the range may include Oregon, Wyoming, and other adjacent states if activity rises to G2.

The most favorable time is from midnight to early morning. Total darkness helps detect colored lights, which result from the interaction of solar particles with oxygen and nitrogen in the upper atmosphere.

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Como works the Northern Lights

Partículas charged from Sol collide with gases in the Earth’s atmosphere. Oxygen produces green and red tones. Nitrogen generates blues and purples. The magnetic field of Terra directs these particles towards the polar regions. This is why the phenomenon is more common near the poles.

In periods of greater solar activity, such as the current cycle, the chances of the aurora extending to mid-latitudes increase. Solar cycle 25 continues to be in a high phase, which explains the higher frequency of alerts in recent months.

Dicas for those who want to try to observe the phenomenon

Escolha a point with a clear view to the north. Evite lights of big cities. Aplicativos aurora and weather forecast help you plan. Câmeras with manual adjustment better captures faint colors that the human eye sometimes doesn’t register.

• Verifique the real-time Kp index on NOAA or equivalent websites
• Prefira nights without a full moon for greater contrast
• Vista warm clothes and a light chair or thermal insulator
• Use night mode or long exposure on cell phone camera
• Compartilhe photos only after confirming the safety of the location

Monitoramento continues over the next few days

Activity is expected to decrease after April 30th. Previsões indicate a return to calmer levels in early May. Monitoring Equipes tracks data from satellites and ground stations for updates.

Quem lives or travels to favorable regions and can follow real-time alerts. The combination of persistent solar wind and clear skies may still offer isolated opportunities even after the peak predicted for the turn of the 29th.