What would happen if Yellowstone erupted?

As pressure is released, gases dissolved in the magma come out of solution, turning the magma into a boiling froth. The total energy released would be equivalent to an 875,000 megaton explosion. The shockwave would kill 90,000 people. Most of the lava would fall back into the crater.



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Can we survive a Yellowstone eruption? A massive eruption of the Yellowstone supervolcano would spread deadly ash for thousands of miles, killing plant life and affecting humans in its path. Humans who were in its path would surely die, but it would not mean the extinction of the entire human race.

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If the Yellowstone supervolcano ever erupted, it would bring about a calamity for most of the United States. The supervolcano would spew deadly volcanic ash for thousands of miles across the entire country.

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If a major eruption ever were to occur at Yellowstone's “supervolcano,” the event could destroy huge swaths of North America. But in recent years, some scientists have proposed that the amazing power locked beneath the caldera could be harnessed to generate renewable geothermal energy.

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If another large, caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate.

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No. A very large volcanic eruption would cause a severe cold period called a volcanic winter, but not an ice age. Volcanic eruptions cool the planet by creating a fine aerosol of sulfuric acid in the stratosphere. The highly reflective droplets prevent a portion of the sun's light from reaching and heating the surface.

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Yellowstone Supervolcano (Wyoming, United States) Effects of a major eruption: When the Yellowstone Caldera, or supervolcano, in Yellowstone National Park erupts again, its effects would be worldwide, the U.S. Geographical Survey said.

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A: For the most likely type of volcanic eruption in Yellowstone, everywhere would be safe except in the immediate vicinity of the advancing lava flow. In the highly improbable event of a large catastrophic eruption, the great the distance from the eruptive center, the safer it would be.

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The Yellowstone supervolcano last erupted about 640,000 years ago. A sleeping giant is nestled in the western part of the United States. Though it stirs occasionally, it has not risen from slumber in nearly 70,000 years.

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Temperatures in Europe could be at least 5 degrees cooler the summer after the eruption. The actual effects of a Yellowstone super-eruption could be different depending on the size of eruption, the time of year and any number of other factors.

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Always stay at least 100 yards (91 m) away from bears and wolves, and at least 25 yards (23 m) away from all other animals, including bison and elk. Hot springs have injured or killed more people in Yellowstone than any other natural feature. Keep your children close and don't let them run.

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Yellowstone volcano eruption simulations show an unexpected blast would produce ash fallout from the Northwest US down to the southern tip of Florida. Volcanic ash fallout of more than 39.4 inches (one metre) would blanket Yellowstone's immediate vicinity in the states of Wyoming, Montana and Utah.

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How to prepare
  1. Flashlight and extra batteries.
  2. First aid kit and manual.
  3. Emergency food and water.
  4. Manual (nonelectric) can opener.
  5. Essential medicines.
  6. Sturdy shoes.
  7. Respiratory (breathing) protection.
  8. Eye protection (goggles)


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