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Pays de la Loire

Northern lights in Le Mans tonight

Real-time aurora forecast for Le Mans (Pays de la Loire) - latitude 48.01° N, estimated Kp threshold 8.5.

Kp index
6.3
moderate
Hemispheric power
North35GW
South38GW

Source: app.pulsar-si.com
Tonight in Le Mans
Very unlikely
Based on Kp 6.3 and Le Mans's latitude.

Seeing the northern lights from Le Mans

Le Mans, at 48° N in the Sarthe department, sits in a plain with no major relief, offering a clear northern horizon. Auroras become visible from Kp 6.5-7. The region benefits from very dark rural areas a short drive from the urban centre, particularly toward the Maine and Mayenne countryside.

Observation conditions in Le Mans

Bortle 7 in the urban area. The Normandie-Maine regional park (Bortle 4-5, 50 km north) and the Bercé and Sillé forests (Bortle 5) offer the best conditions. The Sarthe plain guarantees a widely open horizon in several directions, which is rare in France and valuable for hunting an aurora.

Recent auroras from Le Mans

10-11 May 2024 (Kp 9): clearly visible red aurora across the Sarthe countryside, sightings from the Bercé forest. 24 March 2024 (Kp 8): confirmed rural observations. 5 November 2023 (Kp 7): faint aurora reported in Mayenne.

Local conditions

Light pollution
Bortle 7 of 9
SQM 18.85 mag/arcsec²
Nearest darker sky
Le Mans
2 km · Bortle 2

Frequently asked questions

Can you see the northern lights from Le Mans?
Yes, but rarely. Typically a Kp index of ≥ 8.5 is needed for the aurora to become visible from Le Mans (latitude 48.0° N). Major geomagnetic storms (Kp 8-9) that reach this latitude happen only a handful of times per 11-year solar cycle.
What Kp index is needed to see auroras from Le Mans?
The approximate Kp threshold for Le Mans is 8.5. Below that, auroras stay confined to high latitudes (Norway, Scotland). Above it, they gradually extend southward. A Kp of 9.5 gives a fair chance, 10.5 a strong one.
When is the best time to watch from Le Mans?
Auroras are a nighttime phenomenon, best observed between roughly 10 PM and 2 AM local time, when the geomagnetic pole is tilted towards the Earth's night side. In practice, peaks depend on when a coronal mass ejection arrives - activity can spike at any hour.
Where around Le Mans offers better conditions?
Move at least 40-60 km north of Le Mans to escape urban light pollution and gain 1-2 magnitudes of limiting magnitude.

Nearby cities

Pays de la Loire
Nantes
Centre-Val de Loire
Tours
Bretagne
Rennes
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