00:00What would really happen if Yellowstone's supervolcano erupted?
00:05That part matters.
00:06The US Geological Survey says there is no evidence that a catastrophic eruption is imminent
00:12and such an event is unlikely in the next few centuries.
00:15But the reason Yellowstone still scares people is simple.
00:19If a true supereruption did happen, the impact would not stay inside the park.
00:25The first place hit would be Yellowstone National Park itself.
00:28The land around the caldera would face the most extreme danger from eruption deposits,
00:34ash, heat and total landscape change.
00:37Grand Teton and Jackson Hole would also be dangerously close, sitting just south of the
00:43volcanic system.
00:45Cody, Wyoming could face heavy ash and disruption.
00:49Bozeman, Montana would be in the wider danger zone.
00:52Billings could see serious ash fall depending on wind direction.
00:56Idaho Falls could be affected by ash, travel shutdowns, water contamination, and power
01:02problems.
01:03Casper and Cheyenne could face dangerous air quality and infrastructure strain.
01:08Salt Lake City could see major transportation, water, and health impacts.
01:13Denver could be hit by ash and regional supply chain chaos.
01:18Even farther places across the Great Plains could deal with thinner ash, grounded flights,
01:24damaged crops, clogged machinery, and unsafe air.
01:28But disappear is the wrong word for most cities.
01:32This would not be a movie where every place instantly vanishes.
01:36The real danger is ash.
01:39Ash can collapse roofs if it piles up wet and heavy.
01:41It can ruin engines, contaminate water, shut down airports, damage crops, and make breathing
01:47difficult.
01:48That is why Yellowstone is watched so closely.
01:52Not because disaster is around the corner.
01:54But because a volcano that powerful deserves respect.
01:58The monster is sleeping.
02:00And for now scientists say it is staying asleep.
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