Aurora Borealis in Frauenfeld, Switzerland Tonight
Aurora Borealis predictions for Frauenfeld tonight — updated every 6 hours
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30-Night Aurora Outlook for Frauenfeld
First 7 nights from data, remaining nights available in the app
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Aurora Borealis in Frauenfeld — What You Need to Know
Aurora Borealis & the Auroral Oval in Frauenfeld
Frauenfeld is located at 47.6°N, 8.9°E (geographic) and 48.1° magnetic latitude. This places it far from the auroral oval. The northern lights (aurora borealis) are only visible during extreme geomagnetic storms (Kp 9), requiring a minimum Kp index of 9.
In Frauenfeld, geographic and magnetic latitudes are close (47.6° vs 48.1°), so standard latitude gives a reasonable indication of aurora chances.
What is the Kp index?
The Kp index is a 0–9 scale that measures global geomagnetic disturbance. Higher Kp values push the auroral oval further from the poles — at Kp 3, aurora is common above 65° magnetic latitude; at Kp 7+, it can reach below 50°. A Kp of 9 means a G5 extreme storm — the most powerful category. These are rare (a few per solar cycle) but when they hit, aurora can be visible at surprisingly low latitudes.
Aurora Borealis Viewing Conditions in Frauenfeld
Even when the Kp index is high enough for Frauenfeld, several factors determine whether you'll actually see the aurora:
- Cloud cover — the single biggest obstacle. You need clear or mostly clear skies.
- Darkness — aurora is only visible when the sun is at least 6° below the horizon (civil twilight or darker).
- Moonlight — a bright moon (especially full) washes out fainter aurora displays. New moon nights are ideal.
- Light pollution — urban skyglow reduces contrast (Falchi et al. 2016). Getting even 15–20 km outside the city center makes a noticeable difference.
Best Time to See Aurora Borealis in Frauenfeld
Aurora sightings in Frauenfeld are rare and typically require a major geomagnetic storm (Kp 9+). When they happen, the best chances are during dark winter nights between October and February, away from city lights. During solar maximum (like 2024–2025), these storms occur more frequently, increasing the odds.
Frequently Asked Questions — Aurora Borealis in Frauenfeld
Can I see aurora borealis in Frauenfeld tonight?
It depends on the current Kp index. Frauenfeld needs a Kp of 9 or higher for aurora borealis to be visible. Check the live forecast above for tonight's prediction, or download the Revon app for real-time alerts.
What Kp index is needed for northern lights in Frauenfeld?
Frauenfeld is at 48.1° magnetic latitude and requires a minimum Kp index of 9 for aurora to be visible. The Kp index is a 0-9 scale measuring geomagnetic activity — higher values push the auroral oval further from the poles.
When is the best time to see aurora borealis in Frauenfeld?
The best time to see aurora borealis in Frauenfeld is October through February, during major geomagnetic storms, when nights are long and dark enough for observation. Within those months, the hours between 10 PM and 2 AM local time typically offer the best chances.
How does the aurora borealis forecast work?
The forecast combines NOAA solar wind and Kp index data with a machine learning model to predict aurora probability for each location. It updates every 6 hours on the website and every 15 minutes in the Revon app, which also factors in cloud cover, darkness, moonlight, and light pollution.