One of the largest volcanoes in the world lies hidden beneath Yellowstone National Park, a vast area of beautiful wildness that receives about 3 million visitors a year.
Frequently, media reports have stated that an eruption in Yellowstone is imminent. They assert that the super volcano will erupt soon because its last recent eruption was 70,000 years ago. But volcanoes don’t function that way. As the scientist-in-charge at the Yellowstone Volcano Observatory and a geophysicist, Michael Poland told Live Science in an email, “Volcanoes don’t work on timeframes. This is certainly the most widespread myth about Yellowstone, and about volcanoes in general. When there is sufficient eruptible magma below the surface and pressure that causes that magma to ascend, they erupt.
Source: https://www.livescience.com/yellowstone-caldera-supervolcano-eruption