Naga fireballs (Mekong lights)
Reddish balls of light said to rise from the Mekong River each October around the end of Buddhist Lent, attributed locally to the phaya nak, a great serpent.
2002 CE · 18.02, 103.08 · status: disputed
The account
Sightings centre on Phon Phisai district in Thailand's Nong Khai province and draw large festival crowds. Locals called them ghost lights until the mid-1980s, when the council renamed them phaya nak lights. Reports range from tens to thousands of fireballs a night.
The sceptical view
A 2002 Thai iTV documentary showed Lao soldiers firing tracer rounds into the air across the river during the festival. No fireball has ever been captured or sampled.
The researched reading
A sacred-festival spectacle that is best explained by tracers or flares fired from the Lao bank, not by river gas.
| Explanation | Weight | Why |
|---|---|---|
| Something in the surroundings | 40% | A 2002 Thai iTV documentary filmed Lao soldiers firing tracer rounds into the air across the river during the festival; tracers match the red, silent, rising balls. |
| A hoax or fabrication | 15% | A Chulalongkorn University scientist argues they are projectiles deliberately fired from the Lao side to sustain the festival. |
| A cultural story | 15% | The phaya nak belief frames the phenomenon and resists alternative explanations. |
| A known natural phenomenon | 10% | A methane-phosphine theory has been proposed, but methane burns blue-green, not as red rising balls, which makes it chemically unlikely. |
| Undetermined | 10% | The share the reading had given to fabrication on doubt rather than evidence: the record does not settle it either way. |
| Perception, memory or mind | 7% | Huge crowds expect the fireballs at a sacred time, so every light is counted. |
| Genuinely anomalous | 3% | No fireball has ever been captured or sampled. |
Official position: No official verdict; Thai authorities and scientists remain divided between natural gas and human-made explanations.
Connections in the atlas
- Patala, realm of the nagas
- Nāga
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- The 'Mekong naga' photograph
- ? Can ball lightning explain UFO reports?
- Phi Pop
- Min Min light
- Hessdalen lights