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A new study has discovered a powerful force that is now driving evolution on Earth.

As the disastrous impacts of the Yellowstone eruption are analysed, a warning has been issued: "Normal life is impossible."

The YELLOWSTONE supervolcano poses a significant threat to the United States, with experts saying that living "within 500 miles of the volcano would be untenable" if it erupted.

Yellowstone is one of a dozen supervolcanoes on the planet, each at least seven times more powerful than Mount Tambora, which erupted with the largest known eruption. The Volcanic Explosivity Index [VEI] of supervolcanoes is eight, the highest value on the index. Yellowstone has erupted three times in the last 2.1 million years, the most recent of which happened around 640,000 years ago and was 1,000 times larger than the deadly Mount St Helens explosion of 1980. The huge magma chamber, an underground reservoir filled with hot, flowing rock, is the most prominent feature of a supervolcano.

Based on the pattern of previous eruptions, Yellowstone is due for an eruption, however anything within the next 10,000 years is considered implausible.

This hasn't stopped fieldworkers from predicting future eruptions.

Within a 500-mile radius around Yellowstone, life is supposed to cease to be normal.

In 2004, scientists studied the consequences of previous eruptions in order to forecast what would happen in a modern-day eruption.

While the eruption would be disastrous in and of itself, for those who survive the blast, things could grow far worse. It is thought to be due for an eruption based on the cycle of previous eruptions, though anything within the next 10,000 years is considered unlikely.

According to DNA evidence, the previous supervolcano eruption caused a small Ice Age that nearly wiped off the human race.

The Yellowstone supervolcano's eruption would bring massive destruction across the United States.

Those who survived the initial blast would be confronted with pyroclastic flows that would sweep out from Yellowstone, destroying practically everything within 60 miles.

Within 500 kilometres of the volcano, regular living would be impossible three days after the eruption.

The centre of the United States would be covered by a thick blanket of ash in less than a week, killing thousands of people with a terrible lung illness.

The gases that remain in the air, rather than the ash that falls to the earth, would be the most deadly aspect of the supervolcano eruption.

A tombstone in New Hampshire commemorates the events of 1816, which became known as the "Year Without a Summer."

Average worldwide temperatures fell by 0.4°C to 0.7°C as a result of severe climate anomalies.

The 1815 Mount Tambora eruption, the most intense known eruption in history, is thought to have produced this.

This is a tribute to Reuben Whitten, a New Hampshire farmer who saved the town by growing enough wheat on his acreage to feed the whole village.

Snow in June, frost in July, and frost again in August killed the majority of the wheat in the lowlands.

Reuben Whitten, on the other hand, was able to cultivate enough wheat on the highlands to feed the town.

With severe weather causing crop failures in Europe and around the world, the growing season in New Hampshire was reduced from 120 to 16 days in 1816.

Despite being 10,000 miles away from New Hampshire, the Mount Tambora eruption provides insight into the probable consequences of a Yellowstone eruption, indicating that sulphur dioxide particles were dispersed globally by stratospheric winds.

Because these droplets block some of the sunlight, the sun appears to be weaker.

The famine of 1816 was induced by this dimming effect.

According to some estimates, Tambora killed 71,000 people, more than twice as many as Krakatoa's cataclysmic 1883 eruption, primarily due to starvation.

A supervolcano would very certainly have a greater impact.

It is estimated that a Yellowstone-sized eruption would result in a worldwide temperature reduction of around 10°F.

That's a significant drop in temperature.

Even in equatorial climates, there is frost and snowfall. There is no cold hardiness in tropical vegetation.

In the tropics, a frost would kill all of the above-ground plants.

The loss of a single or two-year crop season could result in the deaths of "billions of people."


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