Maavalgustid

Maavalgustid, often translated as "earthlights" or "earth lamps," refers to a range of purported luminous phenomena observed in the Earth's atmosphere, distinct from known meteorological events like lightning or auroras. These phenomena have been reported across various cultures and time periods, often described as unexplained moving lights, glowing orbs, or flashes emanating from the ground or low in the atmosphere.

Explanations for maavalgustid vary widely. Some theories propose that they are electrical discharges, perhaps related to geological activity or static electricity buildup. Others suggest they could be atmospheric optical illusions, misidentified aircraft, or even biological luminescence. Skeptics often attribute sightings to mundane explanations, such as the reflection of artificial lights, swamp gas (a proposed explanation for will-o'-the-wisps), or psychological factors.

The scientific community generally approaches reports of maavalgustid with caution, as concrete, verifiable evidence for most described phenomena remains elusive. While some specific instances, like the rare Saint Elmo's fire or ball lightning, have scientific explanations, the broader category of maavalgustid often encompasses phenomena that lack such clear attribution. Investigations into these purported lights continue, with some researchers exploring links to seismic activity or atmospheric conditions. The term itself is often used in folklore and ufology to describe lights that defy conventional scientific understanding.