Yellowstone National Park is situated over a supervolcano that is capable of an eruption of magnitude 8. It has had three massive eruptions, all of which created calderas. The first eruption occurred some 2.1 million years ago, and the second took place about 800,000 years later.
Yellowstone is what is known as a “Supervolcano” ie a huge volcano, containing around 11,000 MILES of magma. If it erupts violently again, it will have devastating effects on not just North America, a good chunk of which would be left uninhabitabl.
Huge volcanic eruptions like the most recent big Yellowstone explosion, which occurred 631,000 years ago, are about 10 times bigger than that of Tambora in 1815, and perhaps 100 times bigger than.
A volcano is an opening in the Earth’s crust that allows magma, hot ash and gases to escape. Volcanoes can look like mountains or small hills, depending on what type they are.
It is hard to imagine a volcano this big; for Yellowstone is a supervolcano caused by a Hot spot or mantle plume underneath the American continent. Most continental crust is 20 to 30 miles thick, here it is just 2 caused by the rising of a plume of hot mantle underneath the crust. As the North American plate has moved over the Hot spot it has punched holes through the continental crust. Unlike.
It's very unlikely to happen in our lifetimes, but if the Yellowstone supervolcano were to erupt, scientists think the results could have a major impact on the surrounding areas. It could spread.
Knowledge about past eruptions of Yellowstone combined with mathematical models of volcanic ash dispersion help scientists determine where and how much ashfall will occur in possible future eruptions. During the three caldera-forming eruptions that occurred between 2.1 million and 640,000 years ago, tiny particles of volcanic ash covered much of the western half of North.
This is a sortable summary of the pages Timeline of volcanism on Earth, List of Quaternary volcanic eruptions, and Large volume volcanic eruptions in the Basin and Range Province.Uncertainties as to dates and tephra volumes are not restated, and references are not repeated. Volcanic Explosivity Index (VEI) values for events in the Miocene epoch sometimes lack references.