The 1936 Yellowstone Eruption, also known as the Yellowstone Event or Eruption Day, was a super-volcanic eruption that occurred on the morning of July 18, 1936 at the site of the Yellowstone National Park. It has been considered the largest eruption in recorded history, and perhaps the largest volcanic eruption in history. Tens of thousands died over the first number of days following the eruption, and the ash deposited in the atmosphere led to a worldwide volcanic winter lasting for twelve year