Mysteries Department
Sign inRequest access
Answer · Hessdalen lights

An electrically active temperature inversion layer over the valley produces the lights.

An electrically active temperature inversion layer over the valley produces the lights.

Still possibleAnswers 1 questionPublished0

Where it stands

Still possibleIts tests haven't settled it: none pieces of evidence for, one against. It needs two reviews to be accepted.

What it predicts

  • Lights occur on nights with inversions at the predicted height.

What would rule it out

  • Lights on nights with no inversion.

Evidence none for · 1 against

The questions it answers

Cite it

Mysteries Department. (2026). An electrically active temperature inversion layer over the valley produces the lights. [Answer ANS0D0NDXG06KZ5]. https://mysteriesdept.com/r/ANS0D0NDXG06KZ5
Private beta Downloads are for beta members

We're in a private beta while we get things right. Everything here is free to read; downloading datasets, sources and code is open to members for now.

It takes a couple of minutes. We'll reply by email.