Hessdalen light

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The Hessdalen Light is unexplained light usually seen in the Hessdalen valley in the municipality of Holtålen in Sør-Trøndelag county, Norway.


History and description

Unusual lights have been reported here since 1940s or earlier. Especially high activity of Hessdalen lights took place from December 1981 until the summer of 1984 when lights were observed 15 to 20 times per week. The frequency of the lights caused a gathering of numerous tourists staying there overnight to see the phenomenon.[1] Since then, the activity has decreased and now the lights are observed some 10 - 20 times per year.

The Hessdalen light most often is a bright, white or yellow light of unknown origin standing or floating above the ground level. Sometimes the light can be seen for more than one hour. There are several other types of unexplained lights observed in the Hessdalen valley.


Since 1983 there has been ongoing scientific research often nicknamed "Project Hessdalen", initiated by Dr. Erling Strand. In 1998, the Hessdalen AMS automated scientific research station was built in the valley. It registers and records the appearance of lights.

Later, the EMBLA program was initiated. It brings together established scientists and students into researching these lights. Leading research institutions are Østfold University College (Norway) and the Italian National Research Council.

Possible explanations

In spite of on-going research there is no convincing explanation to the origin of these lights. However, there are numerous working hypotheses.

See also


  1. ^ "Hessdalen lights". Wondermondo. http://www.wondermondo.com/Countries/E/Norway/SorTrondelag/Hessdalen.htm. 
  2. ^ http://www.itacomm.net/ph/2007_HAUGE.pdf
  3. ^ http://www.itacomm.net/ph/rebuttal.pdf
  4. ^ http://www.citeulike.org/article/7607598
  5. ^ http://www.scientificexploration.org/journal/jse_18_2_teodorani.pdf
  6. ^ Teodorani, M (2004). "A Long-Term Scientific Survey of the Hessdalen Phenomenon". Journal of Scientific Exploration 18 (2): 217–251. Archived from the original on January 13, 2008. http://web.archive.org/web/20080113160901/http://www.scientificexploration.org/jse/abstracts/v18n2a2.php. 
  7. ^ http://monographs.iarc.fr/ENG/Monographs/vol81/mono81.pdf
  8. ^ http://physicsworld.com/cws/article/news/30833
  9. ^ Paiva, G. S.; Taft, C. A. (4 August 2010). "A hypothetical dusty-plasma mechanism of Hessdalen Lights". Journal of Atmospheric and Solar-Terrestrial Physics. http://www.citeulike.org/article/7607598. 
  10. ^ http://connection.ebscohost.com/c/articles/67654662/hessdalen-lights-piezoelectricity-from-rock-strain
  11. ^ http://www.sciencedirect.com/science/article/pii/S1364682612000788
  12. ^ http://discover-decouvrir.cisti-icist.nrc-cnrc.gc.ca/eng/article/?id=19336578
  13. ^ Chamberlain, J.W., Physics of the Aurora and Air-glow (Academic Press Inc. , New York, 1961)
  14. ^ Mehr, F J and Biondi, M A, Electron temperature dependence of recombination O2+ and N2+ ions with electrons, Phys. Rev. 181, 264-71 (1969)
  15. ^ Teodorani, M. A., Long-term scientific survey of the Hessdalen phenomenon. Journal of Scientific Exploration, 18, 217–251 (2004)
  16. ^ Paiva, G. S.and Taft, C. A, A mechanism to explain the spectrum of Hessdalen Lights phenomenon, Met. Atm. Phys. 117, 1-4 (2012)
  17. ^ Paiva, G. S.and Taft, C. A, Color Distribution of Light Balls in Hessdalen Lights Phenomenon, J. Sc. Expl. 25, 735 (2011)
  18. ^ Dunning, Brian. "The Hessdalen Lights". Skeptoid. Skeptoid Media, Inc.. http://skeptoid.com/episodes/4270. Retrieved 12 August 2012. 

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