Hessdalen lights

Lights have appeared over the 12-km Hessdalen valley since at least the early 1980s, peaking at up to 20 per week in 1981–84. Unusually, they have been measured: radar, spectra, magnetometers and a permanent camera station have recorded them, but their cause is still debated.

Explanation

Studied since 1983 by Project Hessdalen with an automated measurement station; hypotheses include combustion of dust from the valley’s ores, plasma, and piezoelectric effects.

What was seen

Shape: White, yellow or red floating lights
Witnesses: Residents and scientists
Duration: Ongoing since ~1981

Browse

• Norway
• 1980s
• Unresolved
• Recurring lights
• Many independent witnesses
• Photographs
• Video footage
• Radar tracking
• Infrared or other sensor data
• Lights and fireballs

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• Marfa lights 1 July 1957