Because it's not officially a 'dead' volcano - it's just dormant. Additionally, the caldera covers such a vast area that, in the event of a 'super eruption', the amount of material ejected would affect the Earth for centuries to come. Possibly resulting in the extinction of all life on this planet !
The Yellowstone volcano is usually called a supervolcano.
supervolcano
The Yellowstone volcano is usually called a supervolcano.
The Yellowstone Caldera, also known as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano estimated to be an area of about 34 X 45 miles (55 X 72 km).
The caldera that covers most of Yellowstone Park was produced by a supervolcano. A supervolcano is an explosive volcano capable of producing an eruption with an ejecta volume greater than 1,000 cubic kilometers. The Yellowstone Caldera is one of the largest and most active supervolcanoes in the world.
Yellowstone Volcano is a caldera volcano, which means it has a large depression at its summit formed by a collapse following a cataclysmic eruption. The area is characterized by geothermal features such as hot springs, geysers, and fumaroles. The most prominent feature on the surface is the Yellowstone Caldera, a large crater measuring about 30 by 45 miles.
Yellowstone volcano is classified as a supervolcano, which is a type of volcano that produces extremely large eruptions involving hundreds to thousands of cubic kilometers of volcanic material. It's located in Yellowstone National Park in the United States and has had three massive eruptions in the past 2.1 million years.
That is not true about Lake Toba. They recently discovered Lava in the Super Volcano and it is considered restless. Yellowstone could not hold a candle to what Lake Toba can do the world.
No. Most of Yellowstone lies outside of the Yellowstone Caldera, though this caldera still takes up a large portion of the park. A larger portion of the park is in the older Island Park Caldera, which partly overlaps the Yellowstone Caldera. This still takes up a minority of the park.
At Yellowstone, we see the caldera or what we call a supervolcano. The volcanic profile of Yellowstone in its past is one of a massive eruption that dwarfs anything we understand in current knowledge. Use the link below to the Wikipedia post on the supervolcano to learn more.
No. Most of Yellowstone is outside of the caldera.
Most scientists believe that Yellowstone is not truly active and that they would be able to detect if the Yellowstone volcano was going to erupt years before it erupted. But there is no way to no for sure if the Yellowstone caldera is truly active (building up for an eruption).