- There is a large pocket of methane gas underground. Since methane gas is less dense than air, it rises through and out the ground. A previous earthquake may also have allowed a pathway to open up in the ground to allow methane gas to seep through the ground.
- Methane reacts with oxygen and other chemicals in the air to combust.
- It is a natural phenomenon
Located just past Hengchun’s east gate, Chuhuo’s local topography is made of mudstone. There are many cracks in these mudstone that allow natural gases to be emmited. If there is a fire source. These gases which include methane, can be ignited. It is a natural phenomenon where methane seeps up from the earth and ignites the area around it.