Yellowstone is literally a Super Volcano. So, it is going to be big and if it really goes it is going to be bad. There are unique circumstances that come together to create the situation that exists at Yellowstone. “The hotspot arrived under the Yellowstone area sometime after about 4 million years ago, producing gargantuan eruptions there 2 million, 1.3 million and 642,000 years ago. These eruptions were 2,500, 280 and 1,000 times bigger, respectively, than the 1980 eruption of Mount St. Helens. The eruptions covered as much as half the continental United States with inches to feet of volcanic ash.” However, it is particularly hard to tell when exactly something of this nature will blow, scientists usually date its explosive time frame as every 600,000-800,000 years, though we are just shy of being halfway through that time frame. So they are not technically overdue, but they are indeed due.
Yellowstone National Park is not in danger of erupting because of its geysers but because the entire area is actually a supervolcano. Many geologists have noted recent earthquake activity and theorized that the massive caldera may erupt. It is one of the largest active volcanoes in the world, a vast depression full of magma right beneath the surface rather than the usual “cone” style of volcano. It last erupted 640,000 years ago.
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