Locals had noticed the ground in the area was warmer than usual . The cause of this is still unknown, but it could be a combination of factors including an unusually warm winter and the fact that there are no trees to shade off heat from the sun. Temperature measured at 792C from two metres away . Thought to be caused by a coal seam spontaneously combusting .
Locals had noticed the ground in the area was warmer than usual . Experts ca n't get close enough to determine how deep the hole is . Temperature measured at 792C from two metres away . Thought to be caused by a coal seam spontaneously combusting .