Since at least the 1930s , resident of and visitant to the valley of Hessdalen , Norway , have reported foreign balls of ignitor in the sky above .
While it ’s easy to usher out reports as UFOlogy gimcrack ( specially when some write " papers " question whether the lightscould actually be wormhole ) and some sighting are actually of explainable phenomenon such as " planes " , the brightness have been see reliably throughout the years , in the day and night , and have beenphotographed extensively .
consort to electronic computer scientist Erling Strand – one of a small team from the University of Oslo , the University of Bergen , and the Norwegian Defence Research Establishment who attempt to document and explicate the lights – the sparkle stopped suddenly in 1983 , before returning with relish in 1984 . Strand and his team used radio detection and ranging , a gaussmeter , a radio - spectrum analyser , a seismograph , cameras , a Geiger counter , and an infrared camerato assess the phenomenon , before establishing apermanent observatory to bewitch further incidents .
The lights , according to the data collected as well as witness news report , can move lento , or sometimes dart about andfollow a random way , and can last from a few seconds to over an hour . Where size has been figure , they have been described as being the size of it of a railroad car .
What is causing them ? alas , we do n’t bang for certain , but there are a number of interesting ( and fun ) theories .
One theory , put onwards in a 2010 paper published in theJournal of Atmospheric and Solar - Terrestrial Physics , suggests that the phenomenon is because of radon decaying in the atmosphere , given that Hessdalen valley ( and Norway as a whole ) has one of the highest radon concentration in Europe .
While cool , an evensexier ideafirst declare oneself in 2006 is that the phenomenon could be triggered by the landscape acting as a natural assault and battery , which then discharges at even intervals . The Hessdalen valley is split up in two by a river , with zinc and branding iron - rich John Rock on one side of the river and copper - fertile stone on the other . The anode of this " perfect natural battery " would be the zinc / iron discussion section , while the copper one-half would be the cathode .
The only thing missing is an electrolyte solution to remove burster between the two sections of the battery .
" The absent man to support the ' lifelike battery model ' was identified in 2012 , with the re - discovery of the local sulfur mines . Active until 1933 , they were closed because the excavation company bankrupted , " a teamwrote in 2013 .
" We now hypothesize that the torrents flowing out of the mine and into the Hesja river might moderate sulphuric acid "
The squad noted that anomalies in the charismatic sphere have been detect in the area , consistent with a raw battery . It ’s not known how a rude electric battery would produce enough charge to produce such seeable light source , however , the squad " speculatively suggest that the local machine characteristic of the vale lead to the production of inhuman plasmas and/or ion bubble " .
While an interesting hypothesis , there is still no overall consensus on what is cause the lights , nor whether the vale is act as a gigantic shelling , perhaps as big as the legendary single A.
