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21 July 2008, JellyBean @ 4:19 am

Thai NagaBetween 6 and 9 p.m. on the full moon night of the eleventh lunar month (October), the final night of Buddhist Lent, smokeless, scentless, soundless fireballs begin to rise from the deep of the Mekong River up into the air. This year it will happen on the 26 and 27 October.

For centuries the fireballs were kept a closely guarded secret amongst the villagers, but now thousands of locals, tourists and skeptics gather to watch this phenomenon on the remote border between Thailand and Laos.

One theory is that fermentation of sediment in the river causes methane and nitrogen to ignite into the spectacular display. Investigations by the Thai Ministry of Science and Technology in 2002 seem to favour this theory. However, they do not explain how sediments form in the fast moving water.


Northern Thais have no doubt it is the work of Naga, the serpent of Buddhist lore that haunts the northern reaches of the Mekong. ‘Sightings’ of an eight-meter long, crested silvery eel-like fish are often reported at this time and are the subject of the usual grainy photographs which generate so much controversy.

Cryptozoologists find the stories fascinating. Descriptions of the ‘naga’ are very similar to that of ‘Madtsoids’ — gigantic aquatic snakes from the Cretaceous period. Could descendents of the Madtsoids inhabit the depths of the Mekong River, much in the way that the Pseudoryx, once thought extinct has surfaced in the nearby mountains of northeastern Laos?

Aside from the different theories of the cause, what cannot be disputed is the fireballs’ beauty. For those who have seen them, they are wondrous, whatever the explanation.

This is why, on each full moon night in October, spectators gather on the riverbanks to await the miracle.

Tourism Authority of Thailand: Naga Fireballs of Nong Khai
Mekong Mart: Naga Fire Balls
Khandro Net: Nagas

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