About 23naga
Dr. Kanoksilpa, a pediatrician at Nong Khai healthcare facility, researched this phenomenon for 4 decades and concludes the more than likely explanation to be seasonal accumulations of methane fuelPhaya Nak or Phaya Nāga (Thai: พญานาค; RTGS: phaya nak; lit. 'lord of Nāga', phaya derived from Mon which mean large nobility) or Nakkha