Locals had noticed the temperature in the area was warmer than usual . Experts could n't get close enough to determine how deep the hole is . Temperature occurred at 792C from 300 metres away . likely to be caused by a coal mine 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 .