{"it":{"id":"UFO-HES1981","name":"Hessdalen lights","kind":"ufo","sub":"Historical sighting","place":"Hessdalen valley, Trøndelag, Norway","lat":62.79,"lon":11.19,"date":"1981–present","rep":"Project Hessdalen 1983–85; automated station since 1998.","off":"Natural plasma and combustion hypotheses.","src":[{"t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"}],"tags":["Sightings"],"sum":"In Norway's Hessdalen valley, lights have been seen since 1981, 15 to 20 times a week at the 1981–84 peak.","nsrc":1,"new":1,"qs":["Hessdalen lights have been measured for decades and still aren't explained. If science can't solve the one it can watch every night, what about the rest?","Could the same natural phenomenon explain ancient 'fire in the sky' accounts and modern UAP reports alike? Or is that too tidy?","Fifteen to twenty sightings a week at the peak. Would you camp in that valley, and what would you need to see to call it solved?"],"yt":"Read the station's data reports and mark which details only one witness gave.","rel":["UFO-PET1977"],"hook":"Hessdalen in Norway once logged up to 20 strange lights a week. Radar clocked some at 30.000 km/h.","why":"Rare lights that turn up on instruments, studied by a named research team for over forty years."},"S":{},"rec":{"id":"UFO-HES1981","sum":"In December 1981 people in Hessdalen, a valley in central Norway with about 140 inhabitants, began seeing strange lights. There were up to 20 observations a week, writes Erling P. Strand of Østfold University College, and the high rate lasted until 1984. Now there are about 20 a year.\n\nStrand describes three types. Some are white or blue flashes. Some are yellow lights up to about 10 metres across that can last up to two hours. Others are groups of lights that move together. No heat has ever been recorded from them.\n\nProject Hessdalen was born on 3 June 1983. Its field run in early 1984 lasted 5 weeks and logged 53 phenomena. Radar recorded speeds of up to 30.000 km/h, Strand reports, and in 40% of sightings a magnetic pulsation was present. On 7 August 1998 an automatic measurement station went up in the valley.\n\nThe valley is 15 km long and lies about 120 km south of Trondheim, in an old mining district. Strand's 1984 report was frank: \"We have not found out what this phenomenon is,\" though he added that it \"can be measured.\"\n\nIf a light can be measured for decades and still not named, what is missing from the instruments?","qs":["What is missing from the instruments?","Why did the sightings fall after 1984?","Could an old mining valley shape what appears in its sky?"],"gal":[],"ms":[],"aa":[],"ac":[],"src":[{"t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"},{"id":"VUFO-HES1981-2","t":"Project Hessdalen: the story (April 2002, PDF)","u":"https://old.hessdalen.org/reports/ProjectHessdalen-story-April2002.pdf"},{"id":"VUFO-HES1981-3","t":"EGU General Assembly 2011, abstract EGU2011-9137 (PDF)","u":"https://meetingorganizer.copernicus.org/EGU2011/EGU2011-9137.pdf"},{"id":"VUFO-HES1981-4","t":"Project Hessdalen: technical report 1984","u":"https://old.hessdalen.org/reports/hpreport84.shtml"}],"pts":[{"p":"Project Hessdalen 1983–85; automated station since 1998.","g":"SINGLE SOURCE","b":"S","t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"},{"p":"Spectra suggest about 5,000 K (per research).","g":"SINGLE SOURCE","b":"S","t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"},{"p":"Teodorani 2004 analysis.","g":"SINGLE SOURCE","b":"S","t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"},{"p":"Peak activity Dec 1981 – mid 1984: 15–20 sightings a week.","g":"SINGLE SOURCE","b":"S","t":"Wikipedia: Hessdalen lights","u":"https://en.wikipedia.org/wiki/Hessdalen_lights"}]},"img":null,"md":{"h":"img/m/UFO-HES1981-16x9.webp","w":1600,"hh":900,"alt":"Illustration: setting associated with Hessdalen lights, Hessdalen valley, Trøndelag, Norway","by":"Illustration made for The Nommo","lic":"","lu":"","p":"","g":true,"ct":false,"cap":"","sec":[]},"hh":null,"hs":{}}