Aurora Borealis in South Ostrobothnia, Finland Tonight
Aurora Borealis predictions for South Ostrobothnia tonight — updated every 6 hours
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30-Night Aurora Outlook for South Ostrobothnia
First 7 nights from data, remaining nights available in the app
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Aurora Borealis in South Ostrobothnia — What You Need to Know
Aurora Borealis & the Auroral Oval in South Ostrobothnia
South Ostrobothnia is located at 62.8°N, 22.8°E (geographic) and 60.5° magnetic latitude. This places it within reach of the auroral oval during moderate storms. The northern lights (aurora borealis) are visible during moderate to strong geomagnetic storms, requiring a minimum Kp index of 5.
In South Ostrobothnia, geographic and magnetic latitudes are close (62.8° vs 60.5°), 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 5 (moderate storm) is needed. Kp 5 is classified as a G1 geomagnetic storm by NOAA — these happen roughly 900 times per solar cycle (about every 11 years).
Aurora Borealis Viewing Conditions in South Ostrobothnia
Even when the Kp index is high enough for South Ostrobothnia, 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 South Ostrobothnia
The best time to see aurora in South Ostrobothnia is September through March, when nights are long enough for observation. At this high latitude, summer months bring extended twilight or midnight sun — aurora may be active overhead but invisible against a bright sky. The equinox months (September and March) often bring enhanced geomagnetic activity due to the Russell-McPherron effect.
Frequently Asked Questions — Aurora Borealis in South Ostrobothnia
Can I see aurora borealis in South Ostrobothnia tonight?
It depends on the current Kp index. South Ostrobothnia needs a Kp of 5 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 South Ostrobothnia?
South Ostrobothnia is at 60.5° magnetic latitude and requires a minimum Kp index of 5 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 South Ostrobothnia?
The best time to see aurora borealis in South Ostrobothnia is September through March, 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.