Teodorani publishes a long-term survey of the Hessdalen lights
- When
- Where
- Hessdalen, Norway
- Sources
- 2 public sources

Italian astrophysicist Massimo Teodorani published 'A Long-Term Scientific Survey of the Hessdalen Phenomenon' in the Journal of Scientific Exploration, reviewing instrumented observations of the Norwegian valley lights. Later papers cite it as an early proposal of a geological origin.