The supervolcano that lies beneath Yellowstone National Park in the US is far larger than was previously thought, scientists report.
A study shows that the magma chamber is about 2.5 times bigger than earlier estimates suggested.The study team found the cavern stretches for more than 90km (55 miles), is up to 30km wide, and contains 200-600 cubic km of molten rock. It Reaches depths of between 2km and 15km (1 to 9 miles).
If the Yellowstone supervolcano were to blow today, the consequences would be catastrophic. Major eruptions happened 2.1 million years ago, 1.3 million years ago and 640,000 years ago.
The last one sent ash across the whole x6 of North America, and affected the planet’s climate.